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Journal articles on the topic 'Reproductive phases'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Chandra, Vikram, Ingrid Fetter-Pruneda, Peter R. Oxley, et al. "Social regulation of insulin signaling and the evolution of eusociality in ants." Science 361, no. 6400 (2018): 398–402. http://dx.doi.org/10.1126/science.aar5723.

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Queens and workers of eusocial Hymenoptera are considered homologous to the reproductive and brood care phases of an ancestral subsocial life cycle. However, the molecular mechanisms underlying the evolution of reproductive division of labor remain obscure. Using a brain transcriptomics screen, we identified a single gene,insulin-like peptide 2(ilp2), which is always up-regulated in ant reproductives, likely because they are better nourished than their nonreproductive nestmates. In clonal raider ants (Ooceraea biroi), larval signals inhibit adult reproduction by suppressingilp2, thus producing

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Mazzoni, Talita Sarah, Robie Allan Bombardelli, and Irani Quagio-Grassiotto. "Reproductive Biology of Neotropical Fishes: A Guide to Identification to the Gonadal Morphology During the Reproductive Cycle of Catfish Rhamdia quelen (Siluriformes: Heptapteridae)." Aquatic Science and Technology 8, no. 2 (2020): 15. http://dx.doi.org/10.5296/ast.v8i2.17102.

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In most Teleostei fish, the gametogenesis is a cyclical and seasonal event. The renewal of gametes, through their differentiation, development, maturation and release causes several changes in the morphological characteristics of the ovaries and testes throughout the annual reproductive cycles. These alterations are used to recognize different phases in the reproductive cycles. However, as the number of studies of fish reproduction increased, the number of types of gonadal classification and nomenclatures also diversified. This may make it difficult to communication between researchers and the

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Haldar, Chandna. "Reproductive Phase Dependent Photosensitivity of Gonad and Pineal Gland of a Short-Nosed Fruit Bat, Cynopterus sphinx." Zoological Science 18, no. 6 (2001): 843–51. https://doi.org/10.5281/zenodo.13492371.

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(Uploaded by Plazi for the Bat Literature Project) Photoperiodic sensitivity of gonad in relation to pineal gland activity was noted during two important reproductive phases i.e. reproductively active (February- March) and inactive (July- August) phases of nocturnal flying mammal, Cynopterus sphinx of Indian tropical origin. They were exposed to experimental long (Light: Dark in hours; 16L: 8D) and short (8L: 16D) photoperiods for 30 days during both the reproductive phases. Exposure to the long photoperiod (LP) during reproductively active phase had no significant effect on pineal gland, gona

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Haldar, Chandna. "Reproductive Phase Dependent Photosensitivity of Gonad and Pineal Gland of a Short-Nosed Fruit Bat, Cynopterus sphinx." Zoological Science 18, no. 6 (2001): 843–51. https://doi.org/10.5281/zenodo.13492371.

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(Uploaded by Plazi for the Bat Literature Project) Photoperiodic sensitivity of gonad in relation to pineal gland activity was noted during two important reproductive phases i.e. reproductively active (February- March) and inactive (July- August) phases of nocturnal flying mammal, Cynopterus sphinx of Indian tropical origin. They were exposed to experimental long (Light: Dark in hours; 16L: 8D) and short (8L: 16D) photoperiods for 30 days during both the reproductive phases. Exposure to the long photoperiod (LP) during reproductively active phase had no significant effect on pineal gland, gona

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Haldar, Chandna. "Reproductive Phase Dependent Photosensitivity of Gonad and Pineal Gland of a Short-Nosed Fruit Bat, Cynopterus sphinx." Zoological Science 18, no. 6 (2001): 843–51. https://doi.org/10.5281/zenodo.13492371.

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(Uploaded by Plazi for the Bat Literature Project) Photoperiodic sensitivity of gonad in relation to pineal gland activity was noted during two important reproductive phases i.e. reproductively active (February- March) and inactive (July- August) phases of nocturnal flying mammal, Cynopterus sphinx of Indian tropical origin. They were exposed to experimental long (Light: Dark in hours; 16L: 8D) and short (8L: 16D) photoperiods for 30 days during both the reproductive phases. Exposure to the long photoperiod (LP) during reproductively active phase had no significant effect on pineal gland, gona

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6

Haldar, Chandna. "Reproductive Phase Dependent Photosensitivity of Gonad and Pineal Gland of a Short-Nosed Fruit Bat, Cynopterus sphinx." Zoological Science 18, no. 6 (2001): 843–51. https://doi.org/10.5281/zenodo.13492371.

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(Uploaded by Plazi for the Bat Literature Project) Photoperiodic sensitivity of gonad in relation to pineal gland activity was noted during two important reproductive phases i.e. reproductively active (February- March) and inactive (July- August) phases of nocturnal flying mammal, Cynopterus sphinx of Indian tropical origin. They were exposed to experimental long (Light: Dark in hours; 16L: 8D) and short (8L: 16D) photoperiods for 30 days during both the reproductive phases. Exposure to the long photoperiod (LP) during reproductively active phase had no significant effect on pineal gland, gona

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7

Holekamp, Kay E., and Eli D. Strauss. "Reproduction Within a Hierarchical Society from a Female’s Perspective." Integrative and Comparative Biology 60, no. 3 (2020): 753–64. http://dx.doi.org/10.1093/icb/icaa068.

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Abstract The reproductive biology of many female mammals is affected by their social environment and their interactions with conspecifics. In mammalian societies structured by linear dominance hierarchies, such as that of the spotted hyena (Crocuta crocuta), a female’s social rank can have profound effects on both her reproductive success and her longevity. In this species, social rank determines priority of access to food, which is the resource limiting reproduction. Due largely to rank-related variation in access to food, reproduction from the perspective of a female spotted hyena can only b

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Góngora-Gómez, Andrés Martín, Carlos Humberto Sepúlveda, Héctor Alejandro Verdugo Escobar, et al. "Gonadal maturity of Crassostrea corteziensis cultivated in the Gulf of California." Latin American Journal of Aquatic Research 48, no. 3 (2020): 381–95. http://dx.doi.org/10.3856/vol48-issue3-fulltext-2422.

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The gonadal maturation of the pleasure oyster Crassostrea corteziensis during four cultivation cycles (November 2004-June 2005, N4J5; August 2014-February 2016, A14F16; September 2015-December 2016, S15D16; September 2016-August 2017, S16A17) was studied in the southeastern Gulf of California, Mexico. Although C. corteziensis exhibited the typical reproductive phases (undifferentiated or resting, initial gametogenesis, advanced gametogenesis, maturity, spawning and post-spawning), the intensity of reproduction and the timing of the onset of the different phases of gonadal development varied in

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Chandavar, Vidya R., and Prakash R. Naik. "Seasonal variation in thyroid activity of turtle Lissemys punctata with respect to annual cycle of reproduction." Journal of Applied and Natural Science 2, no. 2 (2010): 194–99. http://dx.doi.org/10.31018/jans.v2i2.119.

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The objective of the present investigation was to study the relationship between thyroid activity and reproductive cycle in turtle Lissemys punctata. The animals were studied in the annual seasonal cycle of reproduction for two consecutive years, which is distinguished into three separate periods namely regenerative, reproductive and recrudescent. The thyroid in L. punctata was observed to be a single pyramid shaped gland, creamy white to reddish-brown in color with lenticular profile. The diameter of the follicle was lowest in regenerative period, whichgradually increased in reproductive peri

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González, Jorge, Isabel Meneses, and Julio Vásquez. "Field studies in Chondracanthus chamissoi (C. AGARDH) KÜTZING: seasonal and spatial variations in life-cycle phases." Biologia Pesquera, no. 26 (March 1, 2024): 3–12. http://dx.doi.org/10.21703/0067-8767.1997.26.2596.

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Chondracanthus chamissoi (C. Ag.) Kützing is a commercial resource in certain areas oí the Chilean coast and is becoming increasingly important due to its food valué in Asían countries. This species grows only in natural beds that require to be rationally exploited in order to avoid their depletion. Since the first step necessary to develop this exploitation is a knowledge of the dynamics of the populations, the study oí seasonal and spatial variations in abundance and reproduction oí a natural bed in the locality of Puerto Aldea has been carried out. Samples taken bimonthly at four different

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BARBO, DOROTHY M. "Reproductive Health Over the Life Phases: An Overview." Clinical Obstetrics and Gynecology 45, no. 4 (2002): 1181–88. http://dx.doi.org/10.1097/00003081-200212000-00024.

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12

Kumar, R. V., and S. S. Virmani. "Isozyme Polymorphism for Est-2 Locus Observed At Rice Vegetative and Reproductive Phases." International Rice Research Newsletter 13, no. 6 (1988): 8. https://doi.org/10.5281/zenodo.7146126.

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This article 'Isozyme Polymorphism for Est-2 Locus Observed At Rice Vegetative and Reproductive Phases' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world

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Zadrag-Tecza, Renata, Magdalena Kwolek-Mirek, Małgorzata Alabrudzińska, and Adrianna Skoneczna. "Cell Size Influences the Reproductive Potential and Total Lifespan of theSaccharomyces cerevisiaeYeast as Revealed by the Analysis of Polyploid Strains." Oxidative Medicine and Cellular Longevity 2018 (2018): 1–17. http://dx.doi.org/10.1155/2018/1898421.

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The total lifespan of the yeastSaccharomyces cerevisiaemay be divided into two phases: the reproductive phase, during which the cell undergoes mitosis cycles to produce successive buds, and the postreproductive phase, which extends from the last division to cell death. These phases may be regulated by a common mechanism or by distinct ones. In this paper, we proposed a more comprehensive approach to reveal the mechanisms that regulate both reproductive potential and total lifespan in cell size context. Our study was based on yeast cells, whose size was determined by increased genome copy numbe

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Millesi, Eva, Anna Strauss, Tamara Burger, Ilse E. Hoffmann, and Manfred Walzl. "Follicular development in European ground squirrels (Spermophilus citellus) in different phases of the annual cycle." REPRODUCTION 136, no. 2 (2008): 205–10. http://dx.doi.org/10.1530/rep-08-0090.

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In seasonally breeding mammals, in particular hibernators, reproduction underlies severe energetic and temporal constraints to enable the allocation of sufficient body fat reserves before winter. Thus, the timing of conception in spring can be crucial in terms of reproductive success. This study investigates follicular development in European ground squirrels (Spermophilus citellus) in three phases of the annual cycle: at vernal emergence, after weaning the offspring and shortly before hibernation. The animals were kept in outdoor enclosures within the natural habitat of the species. They were

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Christopher, Dorothy A., Randall J. Mitchell, and Jeffrey D. Karron. "Pollination intensity and paternity in flowering plants." Annals of Botany 125, no. 1 (2019): 1–9. http://dx.doi.org/10.1093/aob/mcz159.

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Abstract Background Siring success plays a key role in plant evolution and reproductive ecology, and variation among individuals creates an opportunity for selection to act. Differences in male reproductive success can be caused by processes that occur during two stages, the pollination and post-pollination phases of reproduction. In the pollination phase, heritable variation in floral traits and floral display affect pollinator visitation patterns, which in turn affect variation among plants in the amount of pollen exported and deposited on recipient stigmas. In the post-pollination phase, di

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Oliveira, Mônica Rocha de, and Sathyabama Chellappa. "Temporal Dynamics of Reproduction inHemiramphus brasiliensis(Osteichthyes: Hemiramphidae)." Scientific World Journal 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/837151.

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The reproductive aspects ofHemiramphus brasiliensiswere analyzed with a view to verify the temporal dynamics of reproduction. This paper presents data on sex ratio, length at first sexual maturity, macroscopic and histological aspects of gonad development, gonadosomatic index (GSI), reproductive period, and fecundity ofH. brasiliensis. The fishes were captured from the coastal waters of Rio Grande do Norte, northeastern Brazil. Females of this species predominated in the sampled population and were larger in size than the males. The length at the first sexual maturation of males was 20.8 cm an

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Catian, Gisele, Edna Scremin-Dias, and Arnildo Pott. "Reproductive phenology of Polygonum hispidum Kunth and P. punctatum Elliott (Polygonaceae), in response to the flooding cycle in the Pantanal, Brazil." Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais 12, no. 2 (2018): 197–207. http://dx.doi.org/10.46357/bcnaturais.v12i2.96.

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In flood-driven environments the life cycles of organisms are regulated in function of the water regime. The objective of this work is to analyse the phenophases of flowering and fructification of two species of amphibious aquatic macrophytes, Polygonum hispidum Kunth and P. punctatum Elliott, with regard to the flooding cycle of the Brazilian Pantanal. We collected monthly data in 26 plots of 20 ponds during two years. The flooding phases were classified as drought, rising, flood, and receding. The periods with an abundance of water (rising, flooding, and receding) were the most important for

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Weitten, Mathieu, Mathilde Louise Tissier, Jean-Patrice Robin, and Caroline Habold. "Dietary proteins improve hibernation and subsequent reproduction in the European hamster, Cricetus cricetus." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 315, no. 4 (2018): R848—R855. http://dx.doi.org/10.1152/ajpregu.00146.2018.

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The reproductive success of hibernators depends not only on food quality during reproduction but also on their body condition when emerging after hibernation, which, in turn, is highly dependent on the hibernation pattern. To date, no studies, to our knowledge, have fully investigated the role of macronutrients throughout the annual lifecycle of hibernators and the strong interdependency between its different phases. This study tested the effects of two diets with different lipid and protein composition on the prehibernation body condition, hibernation pattern, and reproduction of captive-rear

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Norris, Richard D., Richard M. Corfield, and Julie Cartlidge. "What is gradualism? Cryptic speciation in globorotaliid foraminifera." Paleobiology 22, no. 3 (1996): 386–405. http://dx.doi.org/10.1017/s0094837300016341.

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Analysis of the evolution of the Globorotalia (Fohsella) lineage of planktic foraminifera suggests that reproductive ecology and shell shape have evolved independently in this group. The silhouette of fohsellid shells displays a nearly unbroken anagenetic trend, yet isotopic data show that the fohsellids changed their depth of reproduction during the anagenetic evolution of their skeletons. Remarkably, there are no correlations between anagenesis in skeletal shape and the establishment of reproductive isolation. Apparently, anagenesis masks at least one speciation event that is apparent only i

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Izmaiłow, Romana. "Reproductive strategy in the Ranunculus auricomus complex (ranunculaceae)." Acta Societatis Botanicorum Poloniae 65, no. 1-2 (2014): 167–70. http://dx.doi.org/10.5586/asbp.1996.029.

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A preliminary study of reproductive strategy was carried out on plants representing four cytotypes of the <em>Ranunculus auricomus</em> complex. Diploid plants reproduce sexually, triploids, tetraploids and hexaploids have an apomictic mode of reproduction (apospory combined with pseudogamy). Some morphological characters of the plants connected with reproduction were analyzed at various phases and compared in two successive seasons. The following characters were estimated at the individual level: number of ovules and primary pollen grains per plant, pollen viability, pollen-ovule

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Sinclair, A. R. E., Dennis Chitty, Carol I. Stefan, and Charles J. Krebs. "Mammal population cycles: evidence for intrinsic differences during snowshoe hare cycles." Canadian Journal of Zoology 81, no. 2 (2003): 216–20. http://dx.doi.org/10.1139/z03-006.

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Some mammals in high northern latitudes show regular population cycles. In snowshoe hares (Lepus americanus), these occur every 910 years. One hypothesis proposes extrinsic causes such as food shortage or predation. The other proposes intrinsic causes through different morphs that alternate between different phases of the cycle. The morphs should differ in behaviour or physiology. This hypothesis predicts that animal lineages bred from high and low phases of the population cycle should differ in reproduction and survivorship. In a 16-year breeding program, lineages of purebred high-phase fema

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Stief, C. G. "Mecanismes des phases de l’erection." Andrologie 2, no. 1 (1992): 28–29. http://dx.doi.org/10.1007/bf03034592.

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Zanon, Alencar Junior, Nereu Augusto Streck, Thiago Schmitz Marques da Rocha, et al. "Growth habit effect on development of modern soybean cultivars after beginning of bloom in Rio Grande do Sul." Bragantia 75, no. 4 (2016): 445–58. http://dx.doi.org/10.1590/1678-4499.535.

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ABSTRACT There was a change in the genetics of soybeans grown in southern Brazil from the 2000s, which requires investment in basic and detailed studies about growth and development. The purpose in this paper was to characterize the overlap period of vegetative and reproductive phases, growth in height and the emission of nodes after the beginning of flowering in determinate and indeterminate cultivars in different sowing dates and soybean regions in Rio Grande do Sul. Field experiments were conducted during the growing seasons of 2012/2013 and 2013/2014, in Santa Maria, Itaqui, Frederico West

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Jana, A., and S. P. Sen. "Influence of cellular metabolites on RNA and protein syntheses by Xanthium nuclei of different developmental phases." Canadian Journal of Botany 64, no. 12 (1986): 2922–27. http://dx.doi.org/10.1139/b86-386.

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Leaf nuclei of vegetative and reproductive plants of Xanthium strumarium L. were incubated with the postribosomal supernatant of either phase and changes at the transcriptional level were studied in homologous and heterologous combinations. In the presence of the supernatant of reproductive plants, RNA synthesis by vegetative nuclei was decreased by 25%. Reproductive nuclei were less active in RNA synthesis. Gel electrophoretic studies revealed four RNA bands in vegetative nuclei incubated with reproductive supernatant, including a fast-moving low molecular weight band that could not be detect

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Nunes-Silva, Patrícia, Sergio Dias Hilário, Pérsio de Souza Santos Filho, and Vera Lucia Imperatriz-Fonseca. "Foraging Activity inPlebeia remota, a Stingless Bees Species, Is Influenced by the Reproductive State of a Colony." Psyche: A Journal of Entomology 2010 (2010): 1–16. http://dx.doi.org/10.1155/2010/241204.

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Colonies of the Brazilian stingless beePlebeia remotashow a reproductive diapause in autumn and winter. Therefore, they present two distinct reproductive states, during which colony needs are putatively different. Consequently, foraging should be adapted to the different needs. We recorded the foraging activity of two colonies for 30 days in both phases. Indeed, it presented different patterns during the two phases. In the reproductive diapause, the resource predominantly collected by the foragers was nectar. The majority of the bees were nectar foragers, and the peak of collecting activity oc

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Wang, Ni, Chao Zhang, Min Chen, et al. "Characterization of MicroRNAs Associated with Reproduction in the Brown Planthopper, Nilaparvata lugens." International Journal of Molecular Sciences 23, no. 14 (2022): 7808. http://dx.doi.org/10.3390/ijms23147808.

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Insects have a robust capacity to produce offspring for propagation, and the reproductive events of female insects have been achieved at the molecular and physiological levels via regulatory gene pathways. However, the roles of MicroRNAs (miRNAs) in the reproductive development of the brown planthopper (BPH), Nilaparvata lugens, remain largely unexplored. To understand the roles of miRNAs in reproductive development, miRNAs were identified by Solexa sequencing in short-winged (SW) female adults of BPH. Small RNA libraries derived from three developmental phases (1 day, 3 days, and 5 days after

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PRENTISS, NANCY K. "Nocturnally swarming Caribbean polychaetes of St. John, U.S. Virgin Islands, USA." Zoosymposia 19, no. 1 (2020): 91–102. http://dx.doi.org/10.11646/zoosymposia.19.1.12.

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Nocturnally swarming polychaetes were sampled over a ten-year period (2007–2017) in shallow waters of the Virgin Islands National Park, St. John, United States Virgin Islands. While sampling was qualitative and conducted over different years, months and lunar phases, some patterns were noted in the emergence of swarming polychaetes. Three families (Nereididae, Opheliidae, and Syllidae) had members that swarmed on most nights, while reproductive epitokes from two families appeared only during specific lunar phases: Goniadidae around the full moon and Phyllodocidae around the new moon. Additiona

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Hickmann, Felipe, José Braccini Neto, Luke M. Kramer, et al. "128 Differences in PRRSV Resilience for Reproductive Performance Between Landrace and Duroc Sows." Journal of Animal Science 99, Supplement_1 (2021): 18–19. http://dx.doi.org/10.1093/jas/skab054.033.

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Abstract Studies on differences in resilience to porcine reproductive and respiratory syndrome (PRRS) virus (PRRSV) between breeds are scarce in the literature. Thus, the objective of this work was to assess PRRSV resilience in PRRSV wild-type infected sows from two breeds. Farrowing data included 2546 and 2522 litters from 894 Duroc and 813 Landrace sows, respectively, which were housed together and experienced the same PRRSV outbreak. Traits used for this study were number of piglets born alive (NBA), number born dead (NBD), total number born (TNB), and number weaned (NW). The impact of PRRS

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Casillas, Fahiel, Miguel Betancourt, Lizbeth Juárez-Rojas, et al. "Chronic Stress Detrimentally Affects In Vivo Maturation in Rat Oocytes and Oocyte Viability at All Phases of the Estrous Cycle." Animals 11, no. 9 (2021): 2478. http://dx.doi.org/10.3390/ani11092478.

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Background: Stress has been considered as one of the causes of decreased reproductive function in women. However, direct evidence of the effect of chronic stress on oocytes depending on estrous cycle phases is limited. Objective: The present study aimed to evaluate the impact of chronic stress on the viability, integrity, and maturation of rat oocytes depending on estrous cycle phases, specifically proestrus, estrus, and diestrus. Methods: For this purpose, adult female rats were stressed daily by cold water immersion (15 °C) for 30 consecutive days. Results: In chronically stressed female rat

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Sarvaiya, Nitesh P., Ajay P. Parmar, Mohsin M. Pathan, and Sushil Kumar. "Study on Uterine Environment of Buffaloes during Different Reproductive Phases." Indian Journal of Veterinary Sciences and Biotechnology 17, no. 02 (2021): 87–91. http://dx.doi.org/10.21887/ijvsbt.17.2.17.

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This study was undertaken to examine the changes in composition of hormonal and biochemical constituents of uterine secretions of buffaloes (n = 35) during different phases of reproduction, i.e., proestrus, estrus, metestrus and diestrus and anestrus condition. The protein fractioning of blood and uterine secretions was carried out by Gel electrophoresis. Most of the hormonal and biochemical parameters studied revealed higher levels at the estrus phase, indicating peak metabolic activity at the time of estrus, ovulation and fertilization period. The role of enzymes and macro-micro-minerals lev

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Farooq, Muhammad, Helen Bramley, Jairo A. Palta, and Kadambot H. M. Siddique. "Heat Stress in Wheat during Reproductive and Grain-Filling Phases." Critical Reviews in Plant Sciences 30, no. 6 (2011): 491–507. http://dx.doi.org/10.1080/07352689.2011.615687.

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KVIST, S. BÉATRICE M., and RITVA-KAJSA SELANDER. "Open-field thigmotaxis during various phases of the reproductive cycle." Scandinavian Journal of Psychology 35, no. 3 (1994): 220–29. http://dx.doi.org/10.1111/j.1467-9450.1994.tb00946.x.

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González, Fernanda G., Gustavo A. Slafer, and Daniel J. Miralles. "Vernalization and photoperiod responses in wheat pre-flowering reproductive phases." Field Crops Research 74, no. 2-3 (2002): 183–95. http://dx.doi.org/10.1016/s0378-4290(01)00210-6.

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Alzahrani, Faisal, and Fathelrahman Hassan. "Modulation of Platelet Functions Assessment during Menstruation and Ovulatory Phases." Journal of Medicine and Life 12, no. 3 (2019): 296–300. http://dx.doi.org/10.25122/jml-2019-0005.

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During menstruation, endometrial hemostasis is achieved by platelet aggregation, fibrin deposition, and thrombus formation that interact with local endocrine and immunological factors which cause termination of menstrual bleeding. Interactions between steroidal sex hormones and platelet functions are not well understood. The aim of this study was to evaluate the effect of platelet function during the menstrual cycle and luteal phase in women of reproductive age. The cross-sectional study on women of reproductive age included 44 healthy women. Platelet function was assessed by PFA-100TM analyze

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Raucci, F., S. D’Aniello, and M. M. Di Fiore. "Endocrine roles of d-aspartic acid in the testis of lizard Podarcis s. sicula." Journal of Endocrinology 187, no. 3 (2005): 347–59. http://dx.doi.org/10.1677/joe.1.06115.

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In the lizard Podarcis s. sicula, a substantial amount of d-aspartate (d-Asp) is endogenous to the testis and shows cyclic changes of activity connected with sex hormone profiles during the annual reproductive phases. Testicular d-Asp content shows a direct correlation with testosterone titres and a reverse correlation with 17β-estradiol titres. In vivo experiments, consisting of i.p. injections of 2.0 μmol/g body weight of d-Asp or other amino acids, in lizards collected during the three main phases of the reproductive cycle (pre-reproductive, reproductive and post-reproductive period), revea

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Plexico, Laura W., Mary J. Sandage, Heidi A. Kluess, Ana M. Franco-Watkins, and Leslie E. Neidert. "Blood Plasma Hormone–Level Influence on Vocal Function." Journal of Speech, Language, and Hearing Research 63, no. 5 (2020): 1376–86. http://dx.doi.org/10.1044/2020_jslhr-19-00224.

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Purpose This preliminary study examined the influence of menstrual cycle phase and hormone levels on acoustic measurements of vocal function in reproductive and postmenopausal females. Mean fundamental frequency (f0), speaking fundamental frequency (Sf0), and cepstral peak prominence (CPP) were evaluated. It was hypothesized that Sf0 and CPP would be lower during the luteal and ischemic phases of the menstrual cycle. Group differences with lower values in postmenopausal females and greater variability in the reproductive females were also hypothesized. Method A mixed factorial analysis of vari

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Tucker, Emily K., Megan E. Zurliene, Cory D. Suski, and Romana A. Nowak. "Gonad development and reproductive hormones of invasive silver carp (Hypophthalmichthys molitrix) in the Illinois River." Biology of Reproduction 102, no. 3 (2019): 647–59. http://dx.doi.org/10.1093/biolre/ioz207.

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Abstract Reproduction is a major component of an animal’s life history strategy. Species with plasticity in their reproductive biology are likely to be successful as an invasive species, as they can adapt their reproductive effort during various phases of a biological invasion. Silver carp (Hypophthalmicthys molitrix), an invasive cyprinid in North America, display wide variation in reproductive strategies across both their native and introduced ranges, though the specifics of silver carp reproduction in the Illinois River have not been established. We assessed reproductive status using histol

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Quiroz-Pacheco, Enya N., Francisco Mora, Karina Boege, César A. Domínguez, and Ek del-Val. "Effects of herbivory and its timing on reproductive success of a tropical deciduous tree." Annals of Botany 126, no. 5 (2020): 957–69. http://dx.doi.org/10.1093/aob/mcaa117.

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Abstract Background and Aims The implications of herbivory for plant reproduction have been widely studied; however, the relationship of defoliation and reproductive success is not linear, as there are many interacting factors that may influence reproductive responses to herbivore damage. In this study we aimed to disentangle how the timing of foliar damage impacts both male and female components of fitness, and to assess when it has greater impacts on plant reproductive success. Methods We measured herbivore damage and its effects on floral production, male and female floral attributes as wel

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Mishra, Arvind, and C. P. M. Tripathi. "Impact of 30 days exposure of whole Paper mill effluent (WRPBILE) on nucleic acid profile in the liver and gonad of freshwater teleost Mystus vittatus during annual reproductive cycle." Environment Conservation Journal 13, no. 1&2 (2012): 51–56. http://dx.doi.org/10.36953/ecj.2012.131209.

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The present study has been undertaken to investigate the biochemical alterations in teleost fish Mystus vittatus after chronic exposure to sublethal concentrations of paper mill effluent for 30 days. a quantitative estimation of DNA and RNA material was made in liver and gonadal tissues throughout the reproductive cycle of the fish. The biochemical variables studied in the control fish showed the maximum values during the spawning phase as compared to other phases of the reproductive cycle of the fish. The changes produced in the nucleic acid content on account of chronic exposure of the fishe

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Al-Shaeli, Sattar J. J., Baidaa H. R. Al-Mahna, Ali M. Ethaeb, and Hasanain A. J. Gharban. "Review Article: Anatomical and Physiological Development of Reproductive System in Female Murine." Journal of Medical and Health Sciences (JMHS) 3, no. 1 (2025): 34–55. https://doi.org/10.51317/jmhs.v3i1.638.

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The aim of this article is to address the challenges associated with the accurate and consistent staging of the estrous cycle in female laboratory animals, which is critical for reproductive research and preclinical safety evaluations of drugs and chemicals. Laboratory animals, particularly female murine models, are widely used in research as models for mammalian health and disease. However, many substances tested during preclinical investigations interfere with reproductive function, causing morphological changes in the reproductive tract or disruptions in the phases of the estrous cycle. Rec

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Warnock, Julia K., and C. Faye Biggs. "Reproductive Life Events and Sexual Functioning in Women: Case Reports." CNS Spectrums 8, no. 3 (2003): 188–93. http://dx.doi.org/10.1017/s1092852900024421.

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AbstractAre reproductive life events in women associated with an increased risk of sexual dysfunction? Female sexual dysfunction effects up to 40% of women in the United States between 18 and 59 years of age. Sexual dysfunction may be accompanied by fluctuations in gonadal hormone secretion, making women more vulnerable to sexual symptoms, especially during times of reproductive life events. Reproductive life events, such as the use of birth control pills, various phases of the menstrual cycles, postpartum and lactation states, and perimenopause, are highly correlated with changes in sex stero

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Anyanwu, Chinwe Fiona, Owunari Abraham Georgewill, and Udeme Owunari Georgewill. "Effect of Cucurbita pepo (Pumpkin) seed extracts on the cyclicity and reproductive hormones of female Wistar rats." Journal of Herbmed Pharmacology 13, no. 4 (2024): 620–29. http://dx.doi.org/10.34172/jhp.2024.52543.

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Introduction: Despite the traditional use of Cucurbita pepo seed in pregnancy, its effects on female reproduction remain scarce. This study evaluated the impacts of n-hexane, dichloromethane (DCM), and aqueous ethanol extracts of C. pepo seed on the cyclicity and reproductive hormones of female Wistar rats. Methods: Ten groups of four rats received seed extracts or tween 80 orally for 21 days: A (control)= 0.5 mL tween 80 (vehicle); B, C, & D= 142.86, 285.71, and 428.57 mg/kg nHE; E, F, & G= 142.86, 285.71, 428.57 mg/kg of DCM; and H, I, & J= 142.86, 285.71, 428.57 mg/kg of aqueous

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Valera, Oscar Valeriano Sánchez, Maria Inês Diel, Marcos Vinícius Marques Pinheiro, et al. "Base temperature and plastochron are influenced by the development phase in biquinho pepper cultivars." Comunicata Scientiae 13 (May 24, 2022): e3332. http://dx.doi.org/10.14295/cs.v13.3332.

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The objective was to estimate the base temperature and determine the plastochron for Capsicum chinense cultivars during the vegetative and reproductive development phases at different planting times. The experiment was conducted in a randomized block design, 2x4 factorial scheme, cultivars of biquinho pepper (“BRS Moema”, “Airatema Biquinho Amarela”) and growing seasons (E1-E2-E3-E4). The Air temperature was monitored during the vegetative and reproductive phases of the crop. Tb was determined by the minimum mean square error method (QMe). For both phases of the crop development, plastochron w

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Kumar, Mukesh, and Sunayana Singh. "Menopause: a new beginning of happy years." International Journal of Reproduction, Contraception, Obstetrics and Gynecology 11, no. 3 (2022): 1009. http://dx.doi.org/10.18203/2320-1770.ijrcog20220597.

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Menopause is an essential phase of women’s life. Essentially, human female experiences different phases pertaining to the reproductive system and hormonal status these phases are prominently as follows. Childhood phases (0 to 12 year) menstrual phase (12 to 45±4 years) menopausal face (45 to 50±years) and post menopause (50 to till end of her life). Menopause is complete cessation of menstrual cycle at least for a year. Menopausal phase causes many hormonal, physical, physiological, emotional and psychological changes in humans female. These changes are prominent in the reproductive system and

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Villegas-Hernández, Harold, Marta Muñoz, and Josep Lloret. "Reproductive traits of the pompano, Trachinotus ovatus (Linnaeus, 1758), in the north-western Mediterranean." Journal of the Marine Biological Association of the United Kingdom 96, no. 5 (2015): 1053–63. http://dx.doi.org/10.1017/s0025315415001265.

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This study describes for the first time the reproductive traits of the warm-water pompano, Trachinotus ovatus. Specimens were sampled from landings by artisanal fishing vessels in the NW Mediterranean. Monthly collections, from July 2010 through to September 2012, yielded 226 individuals (118 females and 108 males). The size at 50% maturity (L50) was estimated at 30.9 and 29.1 cm TL for females and males, respectively. Specific reproductive traits, such as oocyte size-frequency distributions, presence of recent post-ovulatory follicles along with oocytes in the final phases of gonadal developm

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Vignoli, Leonardo, Manuela D’Amen, Francesca Della Rocca, Marco A. Bologna, and Luca Luiselli. "Contrasted influences of moon phases on the reproduction and movement patterns of four amphibian species inhabiting different habitats in central Italy." Amphibia-Reptilia 35, no. 2 (2014): 247–54. http://dx.doi.org/10.1163/15685381-00002943.

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Many studies have provided evidence that prey adjust their behaviour to adaptively balance the fitness effects of reproduction and predation risk. Nocturnal terrestrial animals should deal with a range of environmental conditions during the reproductive season at the breeding sites, including a variable amount of natural ambient light. High degrees of illumination are expected to minimize those behaviours that might increase the animal detection by predators. Therefore, under habitat variable brightness conditions and in different ecosystems, the above mentioned behaviours are expected to depe

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Daniels, Christiaan, Wilfred Mabusela, Jeanine Marnewick, and Alexander Valentine. "The carbon and nitrogen cost associated with the growth, reproductive and dormant phases of two South African semi-arid geophytic species of Gethyllis (Amaryllidaceae)." Australian Journal of Botany 61, no. 7 (2013): 528. http://dx.doi.org/10.1071/bt13191.

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Gethyllis multifolia L.Bolus and G. villosa Thunb. (Family: Amaryllidaceae) are deciduous and bulbous geophytes that occur in the succulent Karoo biome of South Africa. Both species occupy the same natural habitat, but G. multifolia is threatened and G. villosa not. Both G. multifolia and G. villosa require seasonal bulb reserves for initial vegetative and reproductive growth. In spite of G. villosa having smaller bulbs than G. multifolia, both species produce similar flower sizes and weights. The aim of the present study was to determine the carbon and nitrogen costs of vegetative and reprodu

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Sharma, A., P. Kumar, M. Singh, and N. Vasishta. "Haemato-biochemical and endocrine profiling of north western Himalayan Gaddi sheep during various physiological/reproductive phases." Open Veterinary Journal 5, no. 2 (2015): 103. http://dx.doi.org/10.5455/ovj.2015.v5.i2.p103.

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The study was aimed to provide baseline data regarding haemato-biochemical and endocrine profiling of Gaddi sheep found in north western Himalayan region of Himachal Pradesh, India. Each random sample was collected from 45 Gaddi sheep reared in government sheep breeding farm Tal, Hamirpur, India, during various reproductive phases viz. anestrus, breeding season and post partum period. Haematology revealed significantly higher (P<0.05) RBC as well as haematocrit values in pregnant animals (n=23) during breeding season than during other reproductive phases. The number of platelets were signif

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Alicea, Bradly. "Evolution in eggs and phases: experimental evolution of fecundity and reproductive timing in Caenorhabditis elegans." Royal Society Open Science 3, no. 11 (2016): 160496. http://dx.doi.org/10.1098/rsos.160496.

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To examine the role of natural selection in fecundity in a variety of Caenorhabditis elegans genetic backgrounds, we used an experimental evolution protocol to evolve 14 distinct genetic strains over 15–20 generations. We were able to generate 790 distinct genealogies, which provided information on both the effects of natural selection and the evolvability of each strain. Among these genotypes are a wild-type (N2) and a collection of mutants with targeted mutations in the daf-c, daf-d and AMPK pathways. Differences are observed in reproductive fitness along with related changes in reproductive

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Mello, Romulo Teixeira, Cristina Hueb Barata, Paulo Marcos Zech Coelho, and Aluízio Prata. "Influence of Schistosoma mansoni infection on the reproductive capacity of albino mice." Revista da Sociedade Brasileira de Medicina Tropical 31, no. 6 (1998): 579–80. http://dx.doi.org/10.1590/s0037-86821998000600013.

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This paper reports reduction on the reproductive capacity of female mice infected with Schistosoma mansoni, either in the acute phase or in the chronic one of the disease. This decrease in the reproductive capacity was highly significant (93.3% and 86.7%, for the acute and chronic phases, respectively)..

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