Academic literature on the topic 'Puberty period'
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Journal articles on the topic "Puberty period"
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Dira, I. Komang Prayoga Ariguna, I. Made Arimbawa, and I. Made Darma Yuda. "Hubungan status nutrisi dengan gangguan pubertas pada remaja panti asuhan di Kota Denpasar." Intisari Sains Medis 14, no. 3 (2023): 1016–22. http://dx.doi.org/10.15562/ism.v14i3.1829.
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Background: Puberty is a transition period between childhood and adulthood influenced by various complex factors. Nutrition is one of the most important factors affecting pubertal development. Overweight or obese children are more likely to enter puberty earlier. Severe primary or secondary malnutrition can also delay the onset and progression of puberty. This study aims to determine the relationship between nutritional status and pubertal disorders in Denpasar city orphanage children. Methods: This study was conducted using an analytic research design with a cross-sectional design to determine the relationship between nutritional status and pubertal disorders in Denpasar city orphanage children. This study involved all children in Denpasar city orphanages, Bali, between November and December 2022. Subjects who met the inclusion and exclusion criteria were included in the study. Data were analyzed using SPSS version 25.0 for Windows. Results: This study involved 160 adolescents who had reached the age of puberty in an orphanage in Denpasar City. The sample was classified as having normal puberty, 93.75%, and as many as 10 research samples were found to have puberty disorders (6.25%). The samples were classified as well-nourished (75.00%) and malnutrition (25.00%). This study shows that nutritional status has a significant relationship with pubertal disorders, with a p-value of 0.003 and a prevalence ratio of 7.00 and CI95% (1.90-25.79). Conclusion: This study found that there is a significant relationship between nutritional status and the occurrence of puberty disorders. Adolescents with malnutrition nutritional status have a seven times greater risk of experiencing puberty disorders compared to adolescents with good nutritional status. Latar Belakang: Pubertas merupakan masa transisi antara masa anak-anak dengan dewasa yang di pengeruhi oleh berbagai faktor kompleks. Nutrisi merupakan salah satu faktor terpenting yang mempengaruhi perkembangan pubertas. Anak yang kelebihan berat badan atau obesitas lebih cenderung memasuki masa pubertas lebih awal. Malnutrisi primer atau sekunder yang parah juga dapat menunda permulaan dan perkembangan pubertas. Penelitian ini bertujuan untuk mengetahui hubungan antara status nutrisi dengan gangguan pubertas pada anak panti asuhan kota Denpasar. Metode: Penelitian ini dilakukan menggunakan rancangan penelitian analitik dengan desain potong lintang untuk mengetahui hubungan antara status nutrisi dengan gangguan pubertas pada anak panti asuhan kota Denpasar. Penelitian ini melibatkan semua anak pada panti asuhan kota Denpasar, Bali, diantara periode penelitian November hingga Desember 2022. Subjek yang memenuhi kriteria inklusi dan eksklusi dimasukkan ke dalam penelitian. Hasil: Penelitian ini melibatkan 160 remaja yang telah mencapai usia pubertas di Panti Asuhan yang terletak di Kota Denpasar. Sampel tergolong memiliki pubertas normal 93,75%, sebanyak 10 sampel penelitian ditemukan mengalami gangguan pubertas (6,25%). Sampel tergolong memiliki gizi baik (75,00%) dan malnutrisi (25,00%). Penelitian ini menunjukkan status nutrisi memiliki hubungan signifikan dengan gangguan pubertas dengan nilai p sebesar 0,003 dan prevalence ratio sebesar 7,00 dan IK95% (1,90-25,79). Simpulan: Penelitian ini menemukan bahwa terdapat hubungan yang signifikan antara status nutrisi dengan terjadinya gangguan pubertas. Remaja dengan status nutrisi malnutrisi memiliki risiko tujuh kali lebih besar untuk mengalami gangguan pubertas dibandingkan dengan remaja dengan status nutrisi baik.
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Triboi, Vasile, and Natalia Nastas. "Bio-Psycho-Motor Aspects of Secondary School Students." ACROSS - A Comprehensive Review of Societal Studies 6/2022, no. 3 (2022): 48–53. https://doi.org/10.5281/zenodo.7852794.
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The human is the product of the specific interaction of natural and social factors. Periods of age were divided by specialists differently; Demeter, A. [80] divides from a functional point of view the school-age of 6-18 years old into three periods, unequal in duration, namely: - the small one (ante pubertal) school period 6-11 years-old; - middle school period (puberty) 11-13 years-old in girls, 12-14 years-old in boys; -high school period (post-puberty) 14-18 years-old. This classification is based on the major criterion of the physiological and mental factors represented by puberty, bringing psychophysiological changes with deep consequences in terms of physical constitution, determining the entire somato-functional and mental development of the pupil.
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Shilin, D. Ye. "Retrospective assessment of the course of pubertal period in androgyny." Problems of Endocrinology 42, no. 1 (1996): 20–25. http://dx.doi.org/10.14341/probl11915.
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The course of sexual maturation and specific features of the clinical status were retrospectively studied in 65 women aged 17 to 39 with functional variants of androgyny in order to detect the earliest symptoms of nontumorous androgyny which debuts, as a rule, during the pubertal period. The androgynous syndrome was combined with menstrual dysfunction in 56 patients and coursed as idiopathic hirsutism (with regular biphasic cycle) in 9. Twenty-three (41%) patients of those with menstrual dysfunction, but none of those with the normal cycle, had a history of inverted puberty which started by isolated pubarche. In contrast to patients with normal puberty, inverted puberty was associated with earlier pubarche, late thelarche, and similar terms of menarche, the duration of the premenarche androgenization being prolonged almost live-fold (2.8 0.6 years in patients with inverted puberty vs. 0.6 + 0.1 years in the rest, p0.001). Despite an earlier cessation of growth in inverted puberty, the final height was the same, no matter what the type of puberty. The characteristics of hirsutism were likewise the same, but menstrual dysfunction in patients with inverted puberty was reliably more incident, started earlier, and ran a more grave course (almost always with chronic anovulation). Pubarche was preterm (before the age of 8 years) in 7 patients with inverted puberty and delayed in 16, no differences of any kind being detected between the two groups. A concept on the pathologic type of inverted puberty has been formulated for the first time. Despite the period of its onset, isolated pubarche leads to prolonged androgenization of gonadostat to menarche, this involving a high risk of formation of still more grave nosologic variants of the androgynous syndrome complicated by fertility disorders.
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Sarafyniuk, P. V., L. A. Sarafyniuk, O. P. Khapitska, O. V. Kovalchuk, and N. O. Muzyka. "Dynamics of anthropometric indicators in girls within the pubertal period of ontogenesis." Reports of Morphology 27, no. 2 (2021): 5–10. http://dx.doi.org/10.31393/morphology-journal-2021-27(2)-01.
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The harmony of the organism development in different periods of ontogenesis, and especially puberty, determines the future fate of women in both medical and social aspects. The aim of the research was to study the total and partial body sizes in girls of pubertal period of ontogenesis. We surveyed 128 schoolgirls of 5-8 grades. We evaluated the stages of development of secondary sexual characteristics by hair growth in the axilla and pubis, the development of the mammary glands and age of onset of the first menstruation. According to G.G. Avtandilov’s classification, all girls were divided into three groups – prepubertal (preceding the appearance of pubic hair), pubertal (puberty before menarche) and postpubertal period (fixed and completed pubertal maturation). The group of pubertal girls consisted of 106 schoolgirls, who were divided into groups according to calendar age: 13-year-old (n=29), 12-year-old (n=30), 11-year-old (n=24) and 10-year-old (n=23). Anthropometric survey was conducted according to the scheme of V.V. Bunak and contained the definition of total (length and body weight) and partial (longitudinal, transverse and anterior-posterior) dimensions. The analysis of the obtained results was performed in the license package Statistica 5.5 using non-parametric methods of evaluation of indicators. In our study, it was found that anthropometric indicators characterize the physical development, the level of its harmony and morphofunctional maturity of girls within the pubertal period of ontogenesis. We found a progressive age dynamics of total and partial body size in girls of this age period. The periods of the most intensive growth within the pubertal period of ontogenesis of total and partial sizes of a body are established. At the end of puberty there is the most intense age increase in body length: a rapid increase in body weight begins at the age of 12, the most intense processes of longitudinal growth of the torso and lower extremities in girls are observed from 11 years. Most of the transverse dimensions within the pubertal period of ontogenesis have a pronounced progressive age dynamic. Lower thoracic size, interspinous distance, and external conjugate did not differ statistically significantly between girls of different ages during puberty.
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Nurin Fauziyah, Susanti Tria Jaya, Fannidya Hamdani Zeho, and Suryono. "PENDIDIKAN KESEHATAN TENTANG PUBERTAS PADA SISWA KELAS 5 DAN 6 DI SDN WATES KECAMATAN WATES." Jurnal Abdimas Pamenang 1, no. 2 (2023): 44–48. http://dx.doi.org/10.53599/jap.v1i2.161.
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Abstrak Pubertas atau akil balig merupakan bagian dari perkembangan manusia. Masa ini merupakan masa perubahan atau masa peralihan dari masa kanak-kanak ke masa dewasa, dimana seorang anak mengalami perubahan fisik, sikap atau perilaku, dan pematangan organ reproduksi. Umumnya dimulai pada usia 10-13 tahun dan berakhir pada usia 18-22 tahun. Dimasa ini adalah masa rawan bagi anak yang tidak dibekali dengan ilmu pengetahuan tentang pubertas, perilaku menjaga diri dan etika dalam menghadapi masa peralihan ini. Tujuan dari pengabdian masyarakat ini adalah anak dapat mengontrol dan menjaga diri di masa pubertasnya dengan memberikan pengertian-pengertian tentang perubahan pada dirinya. Penyampaian materi yang diberikan menggunakan media LCD, lembar balik dan tanya jawab. Hasil akhir dari pengabdian ini didapatkan anak-anak mendapatkan peningkatan pengetahuan tentang perubahan pada dirinya serta kesadaran tinggi tentang bagaimana upaya-upaya untuk menjaga dirinya di masa pubertas (100%). Oleh karena itu penting untuk dibuat suatu program inovasi untuk mengoptimalisasi pelayanan kesehatan anak di masa pubertas. Diharapkan program promosi kesehatan ini terus berlanjut sehingga membentuk generasi remaja yang berkualitas. Kata Kunci: Menjaga diri., Pubertas, Perubahan diri, Abstract Puberty or puberty is part of human development. This period is a period of change or transition from childhood to adulthood, where a child experiences physical changes, attitudes or behavior, and maturation of the reproductive organs. Generally begins at the age of 10-13 years and ends at the age of 18-22 years. This period is a vulnerable period for children who are not equipped with knowledge about puberty, self-care behavior and ethics in dealing with this transitional period. The purpose of this community service is that children can control and take care of themselves during puberty by providing insights about changes in themselves. Submission of material provided using LCD media, flipcharts and questions and answers. The end result of this dedication is that children gain increased knowledge about changes in themselves and high awareness of how to take care of themselves during puberty (100%). Therefore it is important to create an innovation program to optimize child health services during puberty. It is hoped that this health promotion program will continue to form a generation of quality youth. Keywords: Take care of yourself. Puberty, Change yourself.
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Diana, SRA, dsouza Verginia, Aisha, et al. "A Study to Assess the Knowledge Regarding Puberty Changes among Female Adolescents in Selected High Schools at Honavar U.K. in a View to Provide Self Instructional Module." Journal of Community and Social Health Nursing 2, no. 1 (2019): 7–9. https://doi.org/10.5281/zenodo.3403479.
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Puberty is the time when you physically become an adult. During puberty, body goes through lots of change and emotions might feel stronger and more intense. People usually start going through puberty between ages 8 and 14. The period between childhood and young adulthood is a period of rapid change: physical, emotional, cognitive and social. A descriptive research design was done and the data was collected with the structured questionnaire. A sample of 50 adolescent girls. The aim of the study is to assess the knowledge regarding puberty changes among female adolescents in selected high schools at Honavar, Uttar Kannada in a view to provide self-instructional module. The data of the respondents had moderate knowledge (66%), 10% of them had adequate knowledge and 24% of them were having inadequate knowledge regarding pubertal changes. The mean percentage of knowledge score was found 60.8% in the aspect of pubertal changes. The study concluded that health education should be provided to all the female adolescents regarding pubertal changes.
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Ngo, Anh Vinh. "Plasma b-type natriuretic peptide concentrations during the adolescent period." Journal of Health Sciences 1, no. 3 (2023): 90–96. https://doi.org/10.59070/jhs010323022.
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DOI: https://doi.org/10.59070/jhs010323022 Objective: Determine plasma NT-ProBNP concentrations during the adolescent period. Object and methods of the study: a prospective, cross-sectional study on 112 patients from 10-18 years old examined at the Department of Adolescent Health, Vietnam National Children's Hospital. Quantify plasma NT-ProBNP concentration and compare this index across juvenile stages, gender, and body mass index. Results: NT-ProBNP concentration in females was higher than in males with a statistically significant difference (p<0.05). There was no statistically significant difference in NT-ProBNP concentrations between the early, middle, and late adolescence stages (p>0.05). In girls, NT-ProBNP concentrations were higher during puberty than during pre-pubertal periods (p<0.05), whereas in boys, NT-ProBNP concentrations during puberty were lower than during pre-pubertal (p<0.05). NT-ProBNP concentration was highest in the underweight group, followed by the normal and overweight groups, and lowest in the obese group with a statistically significant difference (p<0.05). Conclusion: There are differences in NT-ProBNP concentrations according to gender and no changes were observed in the adolescence stages. NT-ProBNP concentrations varied during puberty and according to body mass index (p<0.05).
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Abdulhameed A. Al-Tuhafi, Amenah, and Sajeda Saeed Al-Chalbi. "Changes in bone mineral density during puberty." Tikrit Journal of Pharmaceutical Sciences 8, no. 1 (2023): 68–79. http://dx.doi.org/10.25130/tjphs.2012.8.1.9.68.79.
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Puberty is the fundamental period for bone mass acquisition. In this period mineralization is found to increase with levels of high bone formation.. The objective of this cross-sectional study was to determine the changes in bone mineral density (BMD) and growth parameters for healthy pubertal males and females at different pubertal stages in Mosul city/Iraq. In addition, we aimed to detect the relationship between BMD, age, pubertal stage and growth parameters, and to reveal the most important determinant of BMD in the pubertal period. BMD of the lumbar spine was performed by dual-energy X-ray absorptiometry in (177) healthy pubertal children and adolescents (96 males, 81 females), aged (9.9-20.2) years. Growth parameters (Weight and height) were measured, BMI were calculated. Pubertal stages were assessed and the subjects were subdivided into 5 stages (Tanner stages of puberty for males and females). There was a significant effect of age and puberty on BMD. Females had significantly higher BMD across all age groups because females enter puberty earlier than males. When gender comparison was done according to pubertal stages, males had higher values for BMD in all pubertal stages , but without significant differences between them except in stage III, which indicated that boys gain more BMD than girls at this stage. Both sexes showed the main increments in BMD between stage IV and V. The major independent determinant of BMD in both sexes was pubertal stage. BMD of males was also highly correlated with growth parameters, but no such correlations for females. values in the study group were significantly lower than Western normative values, with Z scores for girls was (-1.2±1.2) and for boys was (-1.4±1.1). In conclusion, bone mass increased throughout puberty in both sexes and there was a strong evidence that pubertal development was consistent and independent predictors of BMD in healthy children and adolescents.
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Ramdani, Ramdani, Tamama Rofiqah, Imalatul Khairat, Muhammad Putra Dinata Saragi, and Randi Saputra. "The Role Of School Counselors To Helping Student in Puberty Through The Collaborative Paradigm." ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) 3, no. 1 (2020): 10–18. http://dx.doi.org/10.32505/enlighten.v3i1.1528.
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Adolescent is one of the stages in human life that is very critical, because it is a stage of transition from childhood to adulthood. At this stage a lot of changes occur in adolescents, such as physical, emotional and social changes. This period of change is commonly referred to as the period of puberty. The puberty period is also considered an overlapping period because it covers the final years of the childhood period and the early years of the teenage period. Changes experienced by adolescents in the puberty period are often troubling because the various changes that occur are considered as a very disturbing clumsiness. As good puberty teenagers, they are expected to understand the physical, emotional and social changes they experience. School counselors have a large role in helping students deal with periods of puberty. This role is reflected in the counseling guidance service provided to help students deal with the period of puberty so that giving birth to a good assessment of the puberty teenager on the changes they experience and puberty teenagers will have a positive self-concept in their lives. Guidance and counseling services provided by school counselors in helping students deal with periods of puberty cannot be done alone. Requires cooperation in the collaborative paradigm in implementing it. The implementation of guidance and counseling services with the collaboration paradigm enables counselors to use other resources to support the implementation of services
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Al-Mauly, N. Z., M. J. Bryant, and F. J. Cunningham. "Reproductive success of ewe lambs after a period of exposure to vasectomised rams." Proceedings of the British Society of Animal Production (1972) 1988 (March 1988): 89. http://dx.doi.org/10.1017/s030822960001727x.
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The fertility of ewe lambs is usually lower than that of mature ewes. Early embryo loss has been implicated as a cause of reduced fertility, especially when matings occur at the pubertal oestrus (Hare and Bryant, 1985). The Introduction of vasectomised rams to ewe lambs may hasten the occurrence of puberty and, if the introduction of fertile rams is not advanced, mating may occur later in the breeding season with possible advantages to fertility. This experiment investigated the effects of a period of association with vasectomised rams preceding the introduction of entire rams upon (1) the occurrence of puberty, and (2) the fertility of ewe lambs.
Dissertations / Theses on the topic "Puberty period"
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Nagai, Shizuyo. "Gonadotropin Levels in Urine during Early Postnatal Period in Small-for-Gestational Age Preterm Male Infants with Fetal Growth Restriction." Kyoto University, 2017. http://hdl.handle.net/2433/226767.
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Martin, Michelle H. Trites Roberta Seelinger. "Periods, parody, and polyphony ideology and heteroglossia in menstrual education /." Normal, Ill. Illinois State University, 1997. http://wwwlib.umi.com/cr/ilstu/fullcit?p9819894.
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Thesis (Ph. D.)--Illinois State University, 1997.<br>Title from title page screen, viewed June 29, 2006. Dissertation Committee: Roberta Seelinger Trites (chair), Jan Susina, Bruce W. Hawkins. Includes bibliographical references (leaves 170-177) and abstract. Also available in print.
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Allen, Carolyn C. "Influence of Nutrition during the Juvenile Period on Gene Expression Within the Hypothalamic Arcuate Nucleus and on Age at Puberty in Heifers." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8522.
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Developmental changes within the hypothalamus are necessary for maturation of
the reproductive neuroendocrine axis. Recent reports have implicated several neuronal
networks in this process, but genes involved in their regulation have not been elucidated.
Using a well-established model for nutritional induction of precocious puberty,
objectives were to 1) use microarray technology to examine changes in gene expression
within the arcuate nucleus (ARC) of the hypothalamus in pre-pubertal heifers fed high or
low-concentrate diets, and 2) determine if high-concentrate diets are required for
nutritional induction of precocious puberty. In Experiment 1, early-weaned, cross-bred
heifers were fed either a high-forage/low-gain (HF/LG; 0.45 kg/d) or a highconcentrate/
high-gain (HC/HG; 0.91 kg/d) diet for 91 d. Analysis of microarray data
indicated that 346 genes were differentially expressed (P < 0.05) between HC/HG and
HF/LG heifers. Expression of three key metabolic genes [neuropeptide Y (NPY), agoutirelated
protein (AGRP), and growth hormone receptor (GHR)] observed to be
differentially expressed in the microarray analysis was investigated further by quantitative PCR. Real-time RT-PCR indicated that expression of NPY, AGRP and
GHR was lower (P < 0.05) in HC/HG compared to HF/LG heifers. In contrast,
concentrations of insulin (P < 0.05), IGF-1 (P < 0.002) and leptin (P = 0.1) were greater
in HC/HG compared to HF/LG. For Experiment 2, 48 heifers were used in 2 replicates
(24 heifers/replicate) in a 2 x 2 factorial design to examine the roles of diet type (HF vs
HC) and rate of gain (LG, 0.45 kg/d vs HG, 0.91 kg/d) on age at puberty. Heifers were
fed HC/HG, HC/LG, HF/HG or HF/LG (n = 12/group) for 14 wk, and then switched to a
common growth diet (0.68 kg/d) until puberty. Heifers in both HG groups reached
puberty at a younger age (54.5 ± 1.8 wk) than heifers in both LG groups (60.2 ± 1.9 wk;
P < 0.04). A marked increase (P < 0.01) in serum concentrations of leptin occurred in
HC/HG heifers between 24 and 30 wk of age. This increase in circulating leptin was not
observed in other groups. Overall, results indicate that nutritional regulation of
reproductive neuroendocrine development involves the control of NPY, AGRP and GHR
expression. The abrupt increase noted for circulating leptin in heifers fed HC/HG diets,
if timed and sustained appropriately, could represent an important temporal cue for
activation of the neuroendocrine system and the onset of puberty.
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YE, LI-ZI, and 葉力子. "Effects of declawing, perch and separating two sexes during rearing period on daily activity, agonistic behavior, sexual behavior in the puberty period and economic traits of country chickens." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/76689710159601202855.
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YANG, CHAO-HSIN, and 楊照馨. "A Latent Growth Models within Development Trend and Changes of Taiwanese Youth Self-Esteem: A Longitudinal Study on Puberty Period from Junior High to College." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/369qg2.
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碩士<br>銘傳大學<br>教育研究所碩士在職專班<br>107<br>The purpose of this study is to investigate the development of Taiwanese teenagers’ self-esteem and growth rates between different gender. In order to analyze the research and obtain a representative sample, the research data based on questionnaires and Taiwanese teenagers’ survey data released from “Taiwan Youth Project (TYP)”. The study used panel study on 7th graders in 2000 conducted for a long-term survey in nine years, with six waves of repeated assessments (junior high school, senior in high school, sophomore and junior in university). Validated by excluding missing values and lost subjects, there are 1,185 people was studied, including 593 boys (50%) and 592 girls (50%). To discuss the growth trajectory of self-esteem and the impact of gender in the development of self-esteem, this study analyzes with the piecewise growth curve model. The results show: (1) The development of Taiwanese teenagers’ self-esteem shows two phases. The first phase is a negative growth (from 7th grade to 9th grade), that is, self-esteem declines year after year in junior high. The second phase is a slight positive growth (senior in high school to junior). The growth rate of self-esteem in the late adolescence to early adulthood has a slowly rising. (2) It’s a negative correlation between the initial status and the growth rate of self-esteem, meaning the higher self-esteem in the 7th grade, the slower growth rate in high school till the early adulthood. On the contrary, the lower self-esteem in the 7th grade, the faster growth rate in high school till the early adulthood. (3) The growth rate of self-esteem on girls is much lower than that of boys. Finally, The results of this study are discussed, and the
recommendations for education and the future studies.
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Kohoutová, Veronika. "Pohled žáků na sociální faktory významně ovlivňující jejich motivaci k učení." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-358075.
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Presented thesis deals with the eighth-grade elementary school pupils' view on social factors significantly affecting their learning motivation. The paper is of theoreticaly-empirical character. The base for the theoretical part is consisted of definitions of the main concepts, such as motivation and learning, social factors, environment, adolescence and demarcation of the major social factors influencing learning motivation. The main goal of the empirical part is to find out, to what extent social factors (parents, teachers, peers) are influential to learning motivation of the eight-graders. There is also a qualitative research presented. The data were collected via semi-structured interviews and analysed using ground theory principles. In total, ten interviews with the eighth-grade pupils were conducted. The main finding of the research is, that informants are mostly motivated by their parents. The teachers most commonly affect the motivation in negative manner. Peer group is the factor, which can be both motivating (by mutual learning help between pupils) and demotivating (by distracting from learning proces). In addition we discovered there are different views on influence of the social factors on pupils who are motivated intrinsically and the ones who are not. Based on the findings in this...
Books on the topic "Puberty period"
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Montemayor, Raymond. From childhood to adolescence: A transitional period? Sage Publications, 1990.
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McGuinness, Lisa. Gotcha covered!: Everything you need to know about your period. Chronicle Books, 2008.
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Gravelle, Karen. The period book: Everything you don't want to ask (but need to know). Walker & Co., 2006.
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Gravelle, Karen. The period book: Everything you don't want to ask (but need to know). Walker & Co., 2006.
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Gravelle, Karen. The period book: Everything you don't want to ask (but need to know). Walker & Co., 2006.
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Gravelle, Karen. The period book: Everything you don't want to ask (but need to know). Walker & Co., 1996.
Find full textBook chapters on the topic "Puberty period"
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Witchel, Selma Feldman. "Polycystic Ovary Syndrome in the Peripubertal Period." In When Puberty is Precocious. Humana Press, 2007. http://dx.doi.org/10.1007/978-1-59745-499-5_13.
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Pedersen, Mette. "Discussion, Possibilities, and Limitations." In Normal Development of Voice. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-42391-8_5.
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AbstractHigh-speed videos are valuable to see details during normal childhood and especially pubertal development. HSV examples in boys show in some cases what can be interpreted as vocal fold modification of two adult and two child registers in boys. Two markings of contact maxima of the vocal folds are seen in Fig. 4.6 during the pubertal period. They are seen in Fig. 4.10 but weaker in boys in the postpubertal period corresponding to Voice Range Profiles (Fig. 4.21f–i).
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Pedersen, Mette. "Answers to the Questions Posed." In Normal Development of Voice. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-42391-8_6.
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"All About Periods, Period." In You-ology: A Puberty Guide for Every Body. American Academy of Pediatrics, 2022. http://dx.doi.org/10.1542/9781610025720-ch08.
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Nottelmann, Editha D., Gale Inoff-Germain, Elizabeth J. Susman, and George P. Chrousos. "Hormones and Behavior at Puberty." In Adolescence and Puberty. Oxford University PressNew York, NY, 1990. http://dx.doi.org/10.1093/oso/9780195053364.003.0007.
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Abstract Early adolescence (ages 10-14) is a period of important developmental transitions. Changes occur in cognitive, emotional, and social functioning and, most strikingly, with the onset of puberty, in physical stature and body contour. In recognition of accumulating evidence of the interrelatedness of psychological functioning and pubertal changes during early adolescence, researchers studying this period of development increasingly are examining psychological processes in relation to the processes of pubertal development. In particular, there is renewed interest in biological-psychosocial interactions (e.g., Lerner & Foch, 1987).
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"Growth and puberty." In Oxford American Handbook of Pediatrics, edited by F. Bruder Stapleton, Robert C. Tasker, Robert J. McClure, and Carlo L. Acerini. Oxford University PressNew York, NY, 2009. http://dx.doi.org/10.1093/oso/9780195329049.003.0013.
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Abstract This is the fastest period of growth, accounting for around 30% of eventual height. Factors that determine growth during this period include maternal size, maternal nutrition, and intrauterine environment. Hormonal factors such as insulin, insulin-like growth factor (IGF)-II, and human placental lactogen are important regulators of growth during this period.
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Cameron, Judy L. "Factors Controlling the Onset of Puberty in Primates." In Adolescence and Puberty. Oxford University PressNew York, NY, 1990. http://dx.doi.org/10.1093/oso/9780195053364.003.0002.
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Abstract There has been considerable debate over the years regarding how to define puberty, in that it is a stage of development that spans an ex tended period of time (in humans and higher primates a period of years) and encompasses a large variety of morphological, physiological, and behavioral changes. However, this chapter will specifically focus on the maturational changes in the reproductive system that occur during puberty. In this context, puberty can be defined as the period of transition from a state of reproductive immaturity to a state of full reproductive competence.
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Hopwood, Nancy J., Robert P. Kelch, Paula M. Hale, Tarina M. Mendes, Carol M. Foster, and Inese Z. Beitins. "The Onset of Human Puberty: Biological and Environmental Factors." In Adolescence and Puberty. Oxford University PressNew York, NY, 1990. http://dx.doi.org/10.1093/oso/9780195053364.003.0003.
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Abstract The human reproductive system undergoes a remarkable period of development and activity during fetal life (Kaplan, Grumbach, & Aubert, 1975) and early infancy, when there is transient secretion of increased gonadal steroids and gonadotropins (Kaplan et al., 1975; Sizonenko, 1978). However, an arrest of maturation occurs shortly thereafter, and the hypothalamic-pituitary-gonadal axis appears to be nearly dormant during early childhood (Conte et al., 1980). It has been postulated that this quiescent period is the result of central nervous system (CNS) restraint systems. Hypothalamic lesions in rodents (Donovan & van der Werff ten Bosch, 1956) and clinical observations in children with precocious puberty who have CNS lesions (Huseman et al., 1978) support the concept that there is an active restraint process of the hypothalamic-pituitary axis during early childhood.
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Butler, Gary. "Recognizing Normal and Disordered Growth." In Oxford Textbook of Endocrinology and Diabetes 3e, edited by John A. H. Wass, Wiebke Arlt, and Robert K. Semple. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780198870197.003.0180.
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Normal growth is a good marker of a child’s well-being. Growth takes place differently during infancy, childhood, or adolescence. Infantile growth is the most rapid period. Childhood growth is slower but with mini-growth spurts. Pubertal physical changes are linked to the rapid acceleration and deceleration of adolescent growth. Puberty is assessed by Tanner staging, but a simpler non-invasive system of the assessing the puberty phases (prepuberty, in puberty, and completing puberty) may be more helpful in daily practice. Weight is multicomponent and body mass index may be a more helpful evaluation tool. WHO growth charts are suitable for use from birth to 5 years as they reflect the true pathway of early growth. Thereafter, local, UK or NCHS charts may be suitable. Specialist charts are available for preterm infants and specific syndromes (e.g. Down, Turner, achondroplasia). Additional useful tools include mid-parental or target height calculation, adult height prediction possibly by bone age estimation.
Conference papers on the topic "Puberty period"
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Utvić, Nikola, Zoran Mojsilović, Đorđe Stanić, and Radenko Arsenijević. "The investigation of morphology differences in puberty period." In Antropološki i teoantropološki pogled na fizičke aktivnosti (11). Univerzitet u Prištini-Kosovska Mitrovica - Fakultet za sport i fizičko vaspitanje u Leposaviću, Leposavić, 2025. https://doi.org/10.5937/atavpa25249u.
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The objective of this study was to investigate the differences in morphological factors, between different ages in puberty period (10, 11, 12, 13, and 14 year old paticipants), and for both sexes independently. The sample consisted of 132 boys (body height: 157.32 ± 10.57 cm, body mass: 51.18 ± 14.92 kg, body mass index: 20.36 ± 4.26 kg/m2) and 194 girls (body height: 155.74 ± 10.15 cm, body mass: 48.81 ± 14.52 kg, body mass index: 19.76 ± 4.17 kg/m2). Anthropometric and body composition variables encompassed body height (BH), body mass (BM), body mass index (BMI), total body water (TBW), proteins (PRT), minerals (MIN), body fat mass (BFM), free-fat mass (FFM), sceletal muscle mass (SMM), and visceral fat (VIS). For variables measurement InBody bioelectrical impedance analysis was used. To investigate differences between age groups, one-way ANOVA was used, independently for both sexes. Statistical significance was establised in BH (p = 0.000), BM (p = 0.000), TBW (p = 0.000), PRT (p = 0.000), MIN (p = 0.000), FFM (p = 0.000), and SMM (p = 0.000), for boys, and in BH (p = 0.000), BM (p = 0.000), BMI (p = 0.000), TBW (p = 0.000), PRT (p = 0.000), MIN (p = 0.000), BFM (p = 0.000), FFM (p = 0.000), SMM (p = 0.000), and VIS (p = 0.002). The present findings suggest that turbulent development in puberty period is displaying many differences in analyzed morphological variables.
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Tomčić, Lana. "CAUSES OF LEARNING DIFFICULTIES IN THE TRANSITIONFROM CLASS TEACHING TO SUBJECT TEACHING." In SCIENCE AND TEACHING IN EDUCATIONAL CONTEXT. FACULTY OF EDUCATION IN UŽICE, UNIVERSITY OF KRAGUJEVAC, 2020. http://dx.doi.org/10.46793/stec20.63t.
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The period of transition from class teaching to subject teaching is marked by changes that greatly affect students. The aim of the paper is to analyze the potential causes that lead to learning difficulties in the transition from class teaching to subject teaching. The goal is achieved at the theoretical level, applying the method of theoretical analysis and content analysis technique. Because of the pre-puberty and puberty period that they are in, students are in a phase of intense growth and development where they are more easily fatigued; their attention is short-lived, which often leads to clumsiness in performing activities and solving tasks. The analysis of the results of the research so far indicates that the fifth grade students are achieving lower school success compared to the previous four years of schooling. The causes of many difficulties that occur in the fifth grade are: the volume and difficulty of the teaching material, the difference in the criteria of students’ assessment, the problem of adaptation to changes in work, the adaptation of teaching procedures to the age of students. The pedagogical implications of this paper are reflected in the identification of causes and their prevention in order to ensure the best possible adaptation of students to new changes.
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CARAMAN, Vlad. "Teaching the elements of Bildungsroman. "La Medeleni" by Ionel Teodoreanu (preadolescents)." In "Ştiință și educație: noi abordări și perspective", conferinţă ştiinţifică internaţională. Ion Creangă Pedagogical State University, 2024. https://doi.org/10.46727/c.v3.21-22-03-2024.p30-33.
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The article proposes an analysis of the Bildungsroman elements from the novel La Medeleni by Ionel Teodoreanu, at the stage of preadolescence. This work valorizes, as I have already stated, in a didactic plan, the theme of ages (childhood, preadolescence, adolescence, maturity, old age), of the human condition (life, death, happiness, failure, suffering), of the struggle (for justice, truth, good, freedom) etc. In the present case, we do not propose a detailed analysis of the novel, but we select crucial moments from the lives of the characters that constitute bridges between various stages of life and we refer, concretely, to the second age of education, namely preadolescence, puberty, through the character Danut. It is about the transition of the main character Danut from primary school to high school. We have certain events that the characters (Danut, Olguta and Monica) go through, following which they evolve. The preparation of Danut's departure from home, the move from Iasi to Bucharest, the temporal separation from his family, from his parents, sister and Monica, constitute the fable of this part of the novel. In the center of the action we also have the Pan Director, the parents Deleanu, Alice and Iorgu who are meditating on Danut's transfer to another locality for high school studies. We have three categories of characters who have divided opinions about the transition, Danut's departure to study in another locality, far from his parents' home. We see what mental processes a person goes through in the period from childhood to puberty. At the same time, we also propose two didactic activities about capitalizing on this theme in Romanian language and literature lessons.
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Tropnikova, A. A., E. S. Andreeva, and E. V. Buynova. "Reproductive toxicity of peat smoke on white rats." In III All-Russian Scientific Conference with International Participation "Science, technology, society: Environmental engineering for sustainable development of territories". Krasnoyarsk Science and Technology City Hall, 2022. http://dx.doi.org/10.47813/nto.3.2022.6.679-685.
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A study of postnatal development of offspring of white rats exposed by peat smoke to during puberty was made. Experimental modeling of a peat fire was carried out once for 4 hours on 45th day of animals life. The concentrations of carbon monoxide and particulate matter PM2.5 in exposure chambers were 29.3±3.5 mg/m3 and 0.395±1.2 mg/m3, respectively. At the age of 3 months, smoke-exposed male and female white rats were mated with intact partners. The neonatal and breastfeeding period, body weight gain, indicators of physical development, and the rate of maturation of sensory-motor reflexes of rat pups from the resulting offspring were determined. It was shown that a single exposure of peat smoke leads to an increase in body weight, a pronounced violation of physical development and maturation of sensory-motor reflexes. The most pronounced disorders were recorded in offspring obtained from females exposed to smoke. These animals demonstrated a lag in physical development, as evidenced by the later appearance of the primary hairline, as well as a significant increase in body weight and a decrease in the rate of maturation of sensorimotor reflexes "negative geotaxis" and "avoidance of cliff".
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Baciu, Anatolie, and Liudmila Listopadova. "Preventing mental and physical fatigue in adolescents' reproductive system development by modernising educational technologies." In "Fiziologia şi sănătatea", congresul fiziologilor. Bulletin of the Academy of Sciences of Moldova. Medical Sciences, 2025. https://doi.org/10.52692/cfzl2024.09.
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The purpose of this paper is to review and synthesize data on educational technologies aimed at facilitating perception, deeper understanding of mechanisms and apply a method of emotional state detection based on facial action coding system (FACS). The review demonstrates the demand and attractiveness for investment of modernized visualization, computer simulation and virtual immersion techniques in understanding complex fundamental mechanisms of living systems at different levels of organization. The described conceptual solutions have a great potential to facilitate, increase the productivity of the educational process and prevent mental and physical fatigue of schoolchildren, especially in the period of their puberty against the background of increased risk of formation of stressogenic suppression of neuroendocrine mechanisms and reproductive failure in the future mature organism. In the practical part, testing of virtual immersion in conditionally neutral, safe and threatening environments on adolescent volunteers after the end of training sessions showed that viewing threatening video content is accompanied by an increase in mimic movements in the area of localization of musculus corrugator supercilii on the background of minimization of movements in the area of musculus zygomaticus major and minor. We assume that immersive virtual reality technologies can be successfully applied to solve various tasks related to the modernization of science education. Qualitative and quantitative assessment of the expression of emotions in schoolchildren can be successfully used to identify the degree of purposefulness, concentration, the presence of motivation and satisfaction or, conversely, dissatisfaction and disgust, as well as for early detection of manifestations of mental or physical fatigue.
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Oliveira, Jefferson Borges de, Caroline Berthier Zanin, Gustavo Carreira Henriques, et al. "Pallister-Hall Syndrome - case report." In XIII Congresso Paulista de Neurologia. Zeppelini Editorial e Comunicação, 2021. http://dx.doi.org/10.5327/1516-3180.575.
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In 1980, Hall et all described a syndrome characterized by “hamartoblastoma”, hypopituitarism, unperfurated anus, polydactyly postaxial and numerous visceral anomalies, today known as Pallister-Hall Syndrome. On the study, Hall et all reported six cases of children with that malformation syndrome - lethal on neonatal period. None of the newborns had anterior hypophysis and the hypothalamic tumor was apparent in the inferior part of the brain, going from the optic chiasm to the interpeduncular fossa. Besides, other anomalies were found, such as: laryngeal split, abnormal pulmonary lobation, renal agenesis or dysplasia, shorts fourth metacarpals, nail dysplasia, multiple mouth frenulum, hypoadrenalism, congenital cardiomyopathy and intrauterine growth retardation. Every case was sporadic, the chromosome were apparently normal, without consaguinity relations. Several similar, milder and even asymptomatic cases were described later on. Kletter and Biesecker (1992), Topf et all (1993) and Penman Splitt et all (1994), define the disease as dominant autosomal inheritance. Kettler and Biesecker (1992) stated that most cases as sporadic as a result of a gene mutation with variable expressiveness. According to Biesecker et al (1996), an international workshop determined diagnostic criteria to the Syndrome: Hypothalamic Hamartroma and Central Polydactyly; First degree relative with hypothalamic hamartroma and polydactyly; Dominant autosomal parrent inheritance or in a consistent form with germaine mosaicism. The radiological changes are important for differential diagnosis between Pallister-Hall Syndrome and other hamartroma-present diseases. The hypothalamic hamartroma isolated has phenotypical features and causes hormonal disorders such as early puberty. On the MRI (Magnetic resonance imaging) it shows hyperintese sign on attenuated fluid. On the other hand, the Pallister-Hall Syndrome the hamartroma shows itself as a isointense signs along with other deformities as polydactyly, for example. According to Kuo et al (1999), on MRI, the classic hypothalamic hamartroma isn’t calcified, is homogenous and isointense to the grey matter on weight images in T1, and isointense and often hyperintense on weight images in T2. Those findings are pretty distinctive and help distinguish the hypothalamic hamartroma from ordinary lesions, as craniopharyngioma and hypothalamic/opticalchiasmic glioma, observed in children. Case report: The patient ALDV, male, born in 30/12/1995, was referred to evaluation on the Medical Genetic Service from HCPA. At the time, aged one year and 8 months, he was the only son of a young, healthy couple with no consanguinity. The family history of similar cases or other genetic pathologies are unknown. The prenatal happened with no intercurrences, unless the smoking mother. It was a natural birth; Birth Weight: 2kg; High: 42cm; PC: 32cm. APGAR 9. At 8 months, starts an investigation for precocious puberty, and a karyotype was performed in her hometown: 46, XY (normal). He presents convulsive crises since one year old. DNPM: cephalic support when he had 8 months, sat without support at the age of one. Physical examination: Head circumference in the 97th percentile, length above the 97th percentile. Good general condition, dysmorphic, facies with fusion of eyebrows (sinofre), epicanthus, small nose, dysplastic ears with a broad shield, three café-au-lait spots on the body. Presence of pubic hair. Increase in length and diameter of the penis, as well as of the testicles, in relation to chronological age. In the hands, significant brachydactyly with bitateral hexadactyly. In the feet, bilateral hexadactyly. Proximal cutaneous syndactyly between the 2nd and 3rd bilateral arthroids, mainly on the right. Additional exams: Rx of hands and wrists for bone age: 7 years; Chronological Age: 1 year and 10 months. Normal abdominal ultrasound; Computed Tomography of Skull/Magnetic Resonance of Skull: hypothalamic expansive lesion (3 cm), compatible with hamartoma; triventricular hydrocephalus; Cavum septum pellucidum. Endocrinological Evaluation: compatible with precocious puberty of central cause. High resolution karyotype: 46, XY (normal). Computed tomography of the brain: Examination for neurological control, performed on 10/12/2014, 18-year-old patient. It was observed solid nodular formation in the hypothalamic region, hypodense, with well-defined limits, in close contact with the mesencephalon, without impregnation by contrast medium administered intravenously, measuring about 2.9 X 2.4 X 3.0 cm, in the respective laterolateral, anteroposterior and craniocaudal planes, which in correlation with the patient’s clinical history may be related to hypothalamic Hamartoma.
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Lambrecht, Franz, and Carsten Sommer. "SafeBike - a road safety programme for young adolescent cyclists." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1002428.
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In 2019, approximately 29,000 children (up to 15 years of age) were involved in road traffic accidents in Germany. The cohorts with the most accident victims are the 11- to 14-year-olds, about half of whom (approx. 6,000 children) were involved in accidents by bicycle. The number of cyclists involved in accidents rises sharply after the transition from primary to secondary school. This is due to a change in driving behavior after the change of school compared to the primary school period. Many pupils start cycling to school after changing to secondary school. Furthermore, extensive behavioral changes occur with the onset of puberty, which, for example, increases the willingness to take risks in road traffic. SafeBike is a road safety program for the particularly vulnerable target group of 11 to 14-year-old cyclists based on observation procedures, self-reflection and personal responsibility. The basic aim of SafeBike is to raise students' awareness of danger perception when cycling, leading to an increased sense of safety in the short term, so that in the long term the number of cycling accidents in the target group will decrease. After participating in the program, students are expected to be more critical of their own behavior, among other things. SafeBike consists of three components: a self-assessment of one's own driving behavior in terms of safety, the treatment of several subject areas in which driving errors and traffic conflicts occur more frequently, and a final re-assessment of one's own driving behavior.The traffic effects of the program were surveyed and evaluated in a pilot test at two different schools in Germany. In the post-surveys, the test group committed about 50% fewer traffic conflicts and driving errors than the control group, which attests to the very high short-term effectiveness of SafeBike. In the control group, who did not complete the program, no significant improvements occurred in comparison to the before survey, in contrast to the subject group. In the test group, there were significant positive effects, especially in the case of driving errors that occurred particularly frequently in the pre-surveys and were correspondingly addressed in the program and discussed by the students. Particularly high positive effects were achieved with conversations while driving, at the pedestrian crossing and using the pavement on the wrong side of the road. Medium effects were achieved with hand signals and looking around. This means that the road safety program can be used in road safety education throughout the country. However, long-term effects are not yet available and must be determined in further studies.
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Yaglova, Nataliya. "DEVELOPMENT AND FUNCTION OF THE ADRENAL CORTEX| IN EXPOSED TO ENDOCRINE DISRUPTOR DDT ORGANISMS." In NEW TECHNOLOGIES IN MEDICINE, BIOLOGY, PHARMACOLOGY AND ECOLOGY. Institute of information technology, 2021. http://dx.doi.org/10.47501/978-5-6044060-1-4.09.
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The present investigation found that developmental exposure to endocrine disruptor DDT affects mechanisms, regulating morphogenesis of adrenal cortex, and production of steroid hormones in pubertal period and adulthood.
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Kuranova, L. L., D. V. Uskalova, A. A. Zhalnina, N. B. Savina, S. N. Koryakin, and E. I. Sarapultseva. "CHANGES IN THE SURVIVAL AND FERTILITY OF THE MODEL TEST ORGANISM AFTER RADIATION IN THE JUVENILE AND PUBERTY PERIODS." In SAKHAROV READINGS 2022: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute of Belarusian State University, 2022. http://dx.doi.org/10.46646/sakh-2022-1-253-256.
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The work analyzes the effect of proton radiation at a dose of 10 Gy on the survival and fertility of crustaceans Daphnia magna. Daphnia were exposed to radiation during the juvenile and pubertal periods of ontogenesis. It has been shown that proton radiation does not affect the survival of crustaceans. The effect of proton radiation is manifested in a change in a more sensitive indicator - fertility. A significant decrease in the fertility of D. magna may be associated with the cytotoxic effect of radiation on germ cells and may affect subsequent generations, which requires additional research.
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Delipovici, Irina, and Inga Deleu. "The importance of the vitamin d and its effects on the human organism." In The International Scientific Congress "Sports. Olimpysm. Health". SOH 2023. 8th Edition. The State University of Physical Education and Sport, 2025. https://doi.org/10.52449/soh23.16.
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The human body needs a variety of nutrients, for a normal fucntionality, and a major one of them is the fat-soluble Vitamin D. This vitamin can be found in several forms, but the most important for human body is Vitamin D2 and D3. The D2 form, named ergocalciferol, is produced by plants and mushrooms. It is also spread in different types of grains - rye, oat, wheat, barley. The Vitamin D3 ("The vitamin of the sun"), also named - cholecalciferol, of animal origin, is synthesized by the organism in 80-90% proportions. It is due to the contact of the B ultraviolet rays and the specific receptors on the skin. The D3 form is contained in some fish species: mackerel, herring, sardine, seafood, as well as liver, beef, milk and egg yolk. Vitamin D3 has superior properties, compared to the D3 form, because it increases the total level of vitamin D in the body, thus its action is long lasting. The researches in the physical education and sports domains, put in evidence the necessity of maintaining in a good norm the concentration of the D vitamin in the organism of a sportsman, due to the fact that it supports the performance development and its keeping. After the ingestion, then absorbtion in the small intestine, the vitamin D3 is transported to the liver and kidneys, where it is activated and doing its beneficial actions: helps the assimilation of the calcium and phosphorus in the small intestine. After they are attached to the bones, theeth, as a response there is the effective skeletal mineralization. This way there are prevented a lot of pathologies: rickets, osteomalacia, osteoporosis, bone fracture; improves the neurocognitive processes, reduces the risk of depression, schizophrenia, Alzheimer's disease; prevents some form of cancer of the mammary glands, of the pancreas, colon and prostate; contributes to the normal endocrine of the glands: pituitary, thyroid, parathyroids, stimulates insulin secretion, thus preventing the diabete; diminishes the risk of cardiovascular diseases, adjusts the heart rate and prevents the miocardial infarction; keeps the muscular function; stimulates the imunity. The necessar concentration of the vitamin D in the organism is 20 - 100 ng/ml. In case the level is below these indicators, it is reported a severe deficit of vitamin D. The deficiency of this important vitamin is caused by a series of factors, as: the insufficient exposure to the sunlight, intestinal absorbtion disorders of vitamin D, a reduced food intake, medication (steroids, laxatives, medicine for weight loss or lowering the cholesterol level). The symptoms of the deficiency of vitamin D are the following: fatigue, weakness, fragile bones, muscle pain, inflamation, the delayed wound healing, hair loss, as well as theeth loss. It is vey necessary to maintain the vitamin D level in the limits of norm, because the excess of it can lead to hypercalcemia, manifested by nausea, vomiting, weakness, excessive thirst, frequent urination, stomach pain etc. Intoxication with vitamin D is recognisable when the level of this vitamin in the blood is above the norms. In present, there is estimated a vitamin D deficiency all over the world, which has reached epidemical proportions, so the meaning of this work is to assess the vitamin D3 in adolescents' body, during puberty. The research objectives: ▪ assessment of vitamin D3 concentration in the teenagerʹs body; ▪ fulfilling the necessary amount of vitamin D3 in the form food supplements. Research materials and methods. After estimating the concentration of vitamin D3 of the 7 tested young people, there was determined the reserve of vitamin D3, which is produced subcutaneous, as well as the concentration obtained after the food ingestion. After the gained resuslts and after the recognition of the results at the lower limit, or even below the lower limit, the young people got the vitamin D as a natural food supplement, in proportion of 1000 UI/day for 2 months. The results of the testings and their analisys. Nowadays a marginalization beyond children is felt about their deprivation of free time spent outdoors. Recent researches made by britanic scientists show that a child spends less time outdoors that a prisoner, which is sitting in a highly secured prison. Actually a lot of children, and even adults manifest symptoms of vitamin D insufficiency. This thing lead us to apreciate the level of vitamin D of young teens, to prevent some disorders, especially in the puberty period. After the administration of a natural supplement of vitamin D (100UI), we got the following results, exposed in the Table 1. Table 1. The concentration of vitamin D3 in the body of adolescents before/after taking the food supplementtableAfter testing the concentration of vitamin D3, it was determined that the food intake, as well as sunlight exposure do not fulfill the necesary vitamin D norm in the young people's organisms.imageFigure 1. Concentration of vitamin D3 in adolescents' organisms (ng/ml). This way, it was necessary to get an additional intake by taking the natural vitamin D3 supplement, the daily dose being 1000 UI. After 2 months of regularly administration the vitamin D3, it has has got a noticeable and favorable increasing in the blood. This was also marked by the young people tested, who felt a much higher physical and mental potential. Conclusions and recommendations: the testing of Vitamin D3 in the adolescents' bodies has shown a subnormal level (average 22.00 +/- 2,46 ng/ml); the supplementay administration of Vitamin D3, in case of deficiency is primordial, because the insufficiency causes a series of pathologies and disorders; fulfilling the intake of Vitamin D3 by taking the food supplement has increased the concentration of the vitamin (average 38,71 +/- 4,38 ng/ml), which had an positive impact on the general state of the body, and especially on the physical form; we recommend a periodic checking of the Vitamin D3 concentration in the blood, for preventing the risk of metabolic disorders.
Reports on the topic "Puberty period"
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Palmer-Quinn, Kerri, Alice Di Pasquale, Margaret Wexler, and Hannah Moody. Critical windows of susceptibility for breast development. Breast Cancer UK, 2023. https://doi.org/10.71450/80329044.
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The normal growth and development of the human body is a critical and highly sensitive process. Despite humans continuously developing throughout life, there are certain periods of development which are more sensitive to adverse factors. These are known as critical windows of susceptibility and include development in utero (in the womb), the postnatal period, puberty, pregnancy and menopause. During these periods the mammary gland (breast) undergoes extensive development. Research suggests that exposure to harmful chemicals such as Endocrine Disrupting Chemicals (EDCs) during these critical periods may adversely affect normal development. In the case of in utero exposure, these effects may be programmed during early development but not manifest until adulthood. Limited research is available on how chemical exposure during these periods affects breast cancer risk. Yet some studies suggest that risk may be increased, likely due to the altered development of the mammary gland.
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Fields, Michael J., Mordechai Shemesh, and Anna-Riitta Fuchs. Significance of Oxytocin and Oxytocin Receptors in Bovine Pregnancy. United States Department of Agriculture, 1994. http://dx.doi.org/10.32747/1994.7568790.bard.
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Oxytocin has multiple actions in bovine reproductive tract and it was our purpose to determine the nature of these actions and their significance for the physiology of bovine reproduction. The bovine oxytocin receptors (OTR) gene was cloned and its expression studied during the cycle and pregnancy. OTR mRNA changed in parallel with OTR with control occurring mainly at the transcriptional level. However, the endocrine regulation of OTR were found in endometrium and cervical mucosa at estrus and at parturition. In both tissues OTR were suppressed in the luteal phase and early pregnancy. Whereas cervical OTR remained suppressed throughout pregnancy, endometrial OTR began to increase soon after implantation and reached higher concentrations in midpregnancy than at estrus. OTR in caruncles did not increase until third trimester, and OTR in cervical mucosa, cotyledons and fetal membranes increased only at term. Myometrial OTR showed less variation and OTR were present throughout the cycle and pregnancy but increased significantly during mid- and late pregnancy. OTR were localized in endometrial epithelial cells and lumina epithelial cells of cervical mucosa as determined by immunohistochemistry. Endometrial OTR were functional throughout pregnancy and mediated PGF release from day 50 onwards in a receptor density related manner. OTR in cervical mucosa mediated PGE release both in vivo and in vitro, as shown in cyclic cows. The ontogeny of uterine OTR was studied from third trimester fetal stage until puberty. OTR were present in endometrium and cervical mucosa in high concentrations throughout this period; myometrial OTR began to increase somewhat later but also reached adult values by 6-mo of age. In the prepuberal heifers OT injections failed to initiate PGF2a, release. The influence of steroids on the effect of OT was examined. Ovariectomy and E2 were without effect, but P4 with or without E2 induced a massive PGF2a release in response to OT in spite of reduced OTR. Bovine cyclooxygenases (COX-1 and COX-2) were cloned and their expression studied in the endometrium of prepuberal heifers and pregnant cows. Untreated and E2 treated prepuberal heifers did not express COX-2 but P4 treated heifers did express the mRNA for COX-2, albeit weakly. During the second half of pregnancy COX-2 mRNA was strongly expressed in cotyledons and somewhat less in caruncles, whereas endometrium, myometrium and cervical mucosa showed only weak, if any, COX-2 mRNA under basal conditions. However, 2 h after OT injection significant increases in COX-2 mRNA were found in endometrial RNA. Thus OT is capable of inducing the expression of the inducible COX-2 gene, and hence the conversion of arachidonic acid to prostanoids. The results indicate that the functions of OT are numerous and probably essential for successful pregnancy and parturition.