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1

Amagai, Takafumi, Daisuke Izumida, Ryosuke Murata, and Kiyoshi Soyano. "Male Pheromones Induce Ovulation in Female Honeycomb Groupers (Epinephelus merra): A Comprehensive Study of Spawning Aggregation Behavior and Ovarian Development." Cells 11, no. 3 (2022): 484. http://dx.doi.org/10.3390/cells11030484.

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This study characterizes the spawning phenomena of the honeycomb grouper (Epinephelus merra), which is a lunar-synchronized spawner that spawns a few days after full moon. To elucidate the aggregation characteristics of wild honeycomb groupers, the numbers of males and females at the spawning grounds were counted before and after the full moon. Approximately 20 males were consistently observed at the spawning grounds throughout the study period. Females appeared several days after full moon and rapidly increased in number, peaking four days after full moon (41 individuals). The maturation stat
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2

Sorensen, Peter W., та Haude M. Levesque. "Hormonal Prostaglandin F2α Mediates Behavioral Responsiveness to a Species-Specific Multi-component Male Hormonal Sex Pheromone in a Female Fish". Integrative and Comparative Biology 61, № 1 (2021): 193–204. http://dx.doi.org/10.1093/icb/icab061.

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Synopsis Although hormonally-derived female sex pheromones have been well described in approximately a dozen species of teleost fish, only a few male sex pheromones have been characterized and the neuroendocrine underpinnings of behavioral responsiveness to them is not understood. Herein, we describe a study that addresses this question using the goldfish, Carassius auratus, an important model species of how hormones drive behavior in egg-laying teleost fishes. Our study had four components. First, we examined behavioral responsiveness of female goldfish and found that when injected with prost
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3

Ahamed, Saokat, Mohammad Maksudul Hassan, Umme Habiba Mustary, Mohammad Tohidul Amin, and Toshinobu Tokumoto. "In vivo induction of male sexual behavior in zebrafish by adding agents to water." PLOS ONE 19, no. 8 (2024): e0300759. http://dx.doi.org/10.1371/journal.pone.0300759.

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Successful fertilization in fish mating occurs when egg maturation in the ovary of the female, ovulation, sperm maturation in the testis of the male, and reproductive behaviors in both sexes are triggered in synchrony. The male sexual behavior of fish is induced by hormones and pheromones. In a previous study, we demonstrated that externally applied hormones added to the water can induce oocyte maturation and ovulation in female zebrafish. Here, we attempted to establish a similar method to induce the sexual behavior of male zebrafish. The male sex steroid testosterone (Tes) triggered sexual b
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4

Ferreira-Silva, José Carlos, Tracy Anne Burnett, Paulo Francisco Maciel Póvoas Souto, et al. "Influence of Male to Female Ratio on Hormone Profiles and Reproductive Performance of Anestrus Postpartum Ewes Subjected to the Male Effect." Acta Scientiae Veterinariae 45, no. 1 (2017): 8. http://dx.doi.org/10.22456/1679-9216.79401.

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Background: Complete isolation of genders allows intense estrous induction and synchronization once rams are introduced in ewe flocks at the onset of the breeding season (BS). This management practice, defined as the male effect, results from a neuroendocrine process mediated by pheromones. The male effect is a straightforward procedure to induce estrous in noncycling ewes, but conditions for its use have not been fully explored. Thus, this study aimed to evaluate hormone levels and ovarian activity of postpartum ewes in anestrus which are subjected to the male effect under different male to f
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5

Johnson, Nicholas S., Mark A. Luehring, Michael J. Siefkes, and Weiming Li. "Mating Pheromone Reception and Induced Behavior in Ovulating Female Sea Lampreys." North American Journal of Fisheries Management 26, no. 1 (2006): 88–96. http://dx.doi.org/10.1577/m05-018.1.

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6

La Vecchia, Carlo. "Infertility, ovulation, induced ovulation, and female cancers." European Journal of Cancer Prevention 20, no. 3 (2011): 147–49. http://dx.doi.org/10.1097/cej.0b013e32834474dc.

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7

McDonough, Paul G., and William H. James. "Male/Female Ratio After Induced Ovulation." Fertility and Sterility 46, no. 4 (1986): 740–41. http://dx.doi.org/10.1016/s0015-0282(16)49666-4.

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8

Koyama, Sachiko, Helena A. Soini, John Foley, Milos V. Novotny, and Cary Lai. "Pheromone-induced cell proliferation in the murine subventricular zone." Biochemical Society Transactions 42, no. 4 (2014): 882–85. http://dx.doi.org/10.1042/bst20140112.

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Enhancement of adult neurogenesis in female mice was previously demonstrated through exposure to soiled bedding from males, although the identity of relevant chemosignals has remained unknown. The farnesenes and SBT (2-sec-butyl-4,5-dihydrothiazole) are male murine pheromones that dominant males secrete at higher levels. Previous studies have shown that they induce oestrus in female mice. We have recently shown that these pheromones strongly increase cell proliferation in the SVZ (subventricular zone) of adult female mice. In addition, we found that a female murine pheromone, 2,5-dimethylpyraz
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9

von Philipsborn, Anne C., Galit Shohat-Ophir, and Carolina Rezaval. "Female Fly Postmating Behaviors." Cold Spring Harbor Protocols 2023, no. 7 (2023): pdb.prot108108. http://dx.doi.org/10.1101/pdb.prot108108.

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Upon copulation, females undergo a switch-like change in their behavior and physiology, known as “postmating responses.” These strong behavioral and physiological changes are triggered by the transfer of male seminal proteins during copulation. Postmating response is associated with strong reduction in receptivity, indicated by the females kicking their legs toward the suitor and curving their abdomen downward to hide their genitalia from them and extruding their ovipositor at the tip of the abdomen, which physically prevents copulation. The transfer of male-specific pheromones, such as 11-cis
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10

Pavlicev, Mihaela, Andreja Moset Zupan, Amanda Barry, et al. "An experimental test of the ovulatory homolog model of female orgasm." Proceedings of the National Academy of Sciences 116, no. 41 (2019): 20267–73. http://dx.doi.org/10.1073/pnas.1910295116.

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The ovulatory homolog model of female orgasm posits that the neuro-endocrine mechanisms underlying female orgasm evolved from and are homologous to the mechanisms mediating copulation-induced ovulation in some mammals. This model predicts that pharmacological agents that affect human orgasm, such as fluoxetine, should also affect ovulation in animals with copulation-induced ovulation, such as rabbits. We tested this prediction by treating rabbits with daily doses of fluoxetine for 2 wk and found that fluoxetine treatment reduces the number of ovulations postcopulation by 30%. In a second exper
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11

Ben-Rafael, Zion, Andre Matalon, Josef Blankstein, David M. Serr, Bruno Lunenfeld, and Shlomo Mashiach. "Male to female ratio after gonadotropin-induced ovulation." Fertility and Sterility 45, no. 1 (1986): 36–40. http://dx.doi.org/10.1016/s0015-0282(16)49093-x.

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12

Slob, A. K., G. van Es, and J. J. van der Werff ten Bosch. "Social factors and puberty in female rats." Journal of Endocrinology 104, no. 2 (1985): 309–13. http://dx.doi.org/10.1677/joe.0.1040309.

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ABSTRACT The effects of postweaning social conditions on the age of puberty were studied in female rats from an early-and a late-maturing strain. The postweaning living conditions consisted of the presence or absence of an adult rat (intact or gonadectomized male, or intact female), or of bedding soiled by adult males. The infantile females exposed to these conditions were caged either singly or with three peers. Puberty was studied in terms of first ovulation, verified always by ovarian histology. Females of the late-maturing strain living without peers reached puberty about 2 days earlier th
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13

Soulsbury, Carl D. "Ovulation mode modifies paternity monopolization in mammals." Biology Letters 6, no. 1 (2009): 39–41. http://dx.doi.org/10.1098/rsbl.2009.0703.

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There are two forms of ovulation: spontaneous and induced. As copulation triggers ovulation for induced ovulators, males can predict the timing of ovulation and may have greater paternity monopolization than spontaneous ovulators. However, this prediction has never, to my knowledge, been tested. Using a cross-species comparison I examined the percentage of offspring sired within a litter (single paternity) and in social species the percentage of offspring sired by the dominant male (alpha paternity). My results indicate that ovulation mode alters the ability of males to monopolize paternity, w
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14

Robb, Tonia, and Mary L. Reid. "Parasite-induced changes in the behaviour of cestode-infected beetles: adaptation or simple pathology?" Canadian Journal of Zoology 74, no. 7 (1996): 1268–74. http://dx.doi.org/10.1139/z96-141.

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Although the cause is often unclear, many parasites alter the behaviour of their intermediate hosts. The larval form of the rat tapeworm, Hymenolepis diminuta, has previously been shown to modify the behaviour of its intermediate host, the flour beetle, Tribolium confusum, in a manner that may be adaptive to the parasite. To test this explanation we observed host behaviours including activity, concealment, and the response to and production of pheromones. Infected female beetles examined both 4–5 and 11–12 days post infection were slower moving and slower to conceal themselves than uninfected
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15

Kouřil, J., M. Svoboda, J. Hamáčková, et al. "Repeated administration of different hormonal preparations for artificial propagation and their effects on reproduction, survival and blood biochemistry profiles of female tench (Tinca tinca L.)." Czech Journal of Animal Science 52, No. 6 (2008): 183–88. http://dx.doi.org/10.17221/2315-cjas.

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The aim of the study was to compare physiological statuses of stripped and not stripped tench females with ovulation induced by GnRHa or carp pituitary extract (CPE). The comparison was based on selected biochemical stress indices (cortisol, glucose), condition (TP, TGA), and cell membrane characteristics (ALT, AST, CK). In the first and in the second year, 37 and 29 tench females were monitored, respectively. No differences in the values of biochemical parameters in either period were found between the two groups of stripped female tench whose ovulation was induced by GnRHa and CPE, respectiv
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16

Tamura, Kazuhiro, Minoru Hatsuta, Gen Watanabe, Kazuyoshi Taya, and Hiroshi Kogo. "Blockage of gonadotropin-induced first ovulation caused by thyroidectomy and its possible mechanisms in rats." American Journal of Physiology-Endocrinology and Metabolism 275, no. 3 (1998): E380—E385. http://dx.doi.org/10.1152/ajpendo.1998.275.3.e380.

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To determine the role of the thyroid gland on the ovarian functions during the initiation process of puberty, we examined the effects and its mechanisms of hypothyroidism on the first ovulation induced by equine chorionic gonadotropin (eCG) in immature female rats. Animals were thyroidectomized on day 22 and were injected with 5 IU of eCG on day 26 to induce the first ovulation on day 29. The number of antral follicles that secrete inhibin and the ovarian weight were significantly increased in thyroidectomized rats (Tx rats) 48 h after eCG treatment compared with those in non-Tx rats. However,
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17

Koyama, Takao, N. Hagino, Anna W. Cothron, and Motoi Saito. "Direct Ovulatory Response with Human Menopausal Gonadotropin of FSH/LH Ratio 4 to 1." American Journal of Chinese Medicine 17, no. 01n02 (1989): 25–28. http://dx.doi.org/10.1142/s0192415x8900005x.

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The experiment was designed to examine if human menopausal gonadotropin (Gonadoryl, GNR, Mochida, Tokyo) influences the ovary and induces ovulation. When fifteen I.U. or GNR 4 (the ratio of FSH to LH is 4 to 1) was given on 28 days of age to immature female rats, ovulation was observed within 24 hours. Neither administration GNR 1.6 (FSH to LH ratio is 1.6 to 1) nor GNR 3.1 (FSH to LH ratio is 3.1 to 1) induced ovulation. Administration of sodium pentobarbital (Nembutal) on the afternoon in GNR 4 treated rats did not block ovulation. It infers that GNR 4 acts on the ovary directly and induces
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18

Stuart, C. C., J. L. Vaughan, C. M. Kershaw-Young, J. Wilkinson, R. Bathgate та S. P. de Graaf. "Effects of varying doses of β-nerve growth factor on the timing of ovulation, plasma progesterone concentration and corpus luteum size in female alpacas (Vicugna pacos)". Reproduction, Fertility and Development 27, № 8 (2015): 1181. http://dx.doi.org/10.1071/rd14037.

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Ovulation in camelids is induced by the seminal plasma protein ovulation-inducing factor (OIF), recently identified as β-nerve growth factor (β-NGF). The present study measured the total protein concentration in alpaca seminal plasma using a bicinchoninic acid (BCA) protein quantification assay and found it to be 22.2 ± 2.0 mg mL–1. To measure the effects of varying doses of β-NGF on the incidence and timing of ovulation, corpus luteum (CL) size and plasma progesterone concentration, 24 female alpacas were synchronised and treated with either: (1) 1 mL 0.9% saline (n = 5); (2) 4 µg buserelin (
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19

Koyama, Takao, N. Hagino, Anna W. Cothron, and Motoi Saito. "Effect of Toki-Shakuyaku-San on Ovulation Induced by Human Menopausal Gonadotropin in Rats." American Journal of Chinese Medicine 16, no. 03n04 (1988): 169–72. http://dx.doi.org/10.1142/s0192415x88000248.

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One hundred and thirty-five immature female rats were treated with Toki-Shakuyaku-San (TSS : 500 mg/kg, Bwt in drinking water) beginning at 25 days of age and continuing during experimental sessions. Fifteen IU of the human menopausal gonadotropin (hMG:Gonadoryl: GNR:GNR 4 contains 4 to 1 ratio of FSH and LH) was injected intraperitoneally on the morning of 28 days of age, and ovulation (presence of tubal ova) was examined on the morning of 29, 30 and 31 days of age. GNR 4 alone induced ovulation at 29 days of age (70%) and at 30 days of age (35%); however, no ovulation was observed at 31 days
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20

Kershaw-Young, C. M., X. Druart, J. Vaughan та W. M. C. Maxwell. "β-Nerve growth factor is a major component of alpaca seminal plasma and induces ovulation in female alpacas". Reproduction, Fertility and Development 24, № 8 (2012): 1093. http://dx.doi.org/10.1071/rd12039.

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Ovulation in camelids is induced by an unidentified protein in the seminal plasma of the male termed ‘ovulation-inducing factor’. This protein has been reported to be a 14-kDa protein under reducing conditions, which, when purified from seminal plasma, induces ovulation in llamas. The identification of this protein and investigation of its potential to induce ovulation in camelids may aid the development of protocols for the induction of ovulation. In the present study, alpaca seminal plasma proteins were separated using one-dimensional sodium dodecyl sulfate–polyacrylamide gel electrophoresis
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21

Taziaux, Melanie, та Julie Bakker. "Absence of Female-Typical Pheromone-Induced Hypothalamic Neural Responses and Kisspeptin Neuronal Activity in α-Fetoprotein Knockout Female Mice". Endocrinology 156, № 7 (2015): 2595–607. http://dx.doi.org/10.1210/en.2015-1062.

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Pheromones induce sexually dimorphic neuroendocrine responses, such as LH secretion. However, the neuronal network by which pheromones are converted into signals that will initiate and modulate endocrine changes remains unclear. We asked whether 2 sexually dimorphic populations in the anteroventral periventricular and periventricular nuclei that express kisspeptin and tyrosine hydroxylase (TH) are potential candidates that will transduce the olfactory signal to the neuroendocrine system. Furthermore, we assessed whether this transduction is sensitive to perinatal actions of estradiol by using
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22

Rajni, Soni, and Kavishwar A. "Effect Of Oral Contraceptive On Absolute Basophil Counts During Different Phases Of Menstrual Cycle." International Journal of Basic and Applied Physiology 2, no. 1 (2013): 63–66. https://doi.org/10.5281/zenodo.4483044.

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Different Method are used to detect the time of ovulation. It is difficult to find out exact time of ovulation. Leucocytes have an active role in ovulation. In our previous studieswe have found that there in significant change in Absolute basophil count in peripheral blood at the time of ovulation. Present study was done to find out effect of oral contraceptive on absolute basophil count in different phases of menstrual cycle and establish a correlation between basophil count and ovulation. Method: Absolute basophil count and ultra sonography was done in forty four female subjects aged 20-40ye
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23

Ali, MS, MGS Riar, MF Siddique, and Y. Mahmud. "Effect of pituitary gland doses on induced breeding of Crucian Carp, Carassius carassius." Journal of the Bangladesh Agricultural University 13, no. 1 (2016): 137–44. http://dx.doi.org/10.3329/jbau.v13i1.28730.

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Induced breeding of crucian carp, Carassius carassius was conducted in order to determine the optimum dose of pituitary gland (PG) hormone. The research was done at the hatchery of the Freshwater Station, Bangladesh Fisheries Research Institute, Mymensingh. The study was consisted of four different doses of PG treatments (T1, T2, T3 and T4) with three replications of each. In the experiment single dose was used for T1 while double dose used for T2, T3 and T4 to evaluate the efficiency of PG hormone on ovulation, fertilization and hatching rates of C. carassius eggs. Single dose of 6.0 mg PG kg
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24

Minge, C. E., B. D. Bennett, V. Tsagareli, R. J. Norman, M. Lane, and R. L. Robker. "260. Effects of diet-induced obesity on ovarian function and female fertility." Reproduction, Fertility and Development 17, no. 9 (2005): 105. http://dx.doi.org/10.1071/srb05abs260.

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Obesity and its related complications (metabolic syndrome, Type II diabetes and polycystic ovary syndrome) are increasingly associated with female infertility. Our research is focused on understanding how diet-induced obesity, which triggers insulin resistance and symptoms of chronic inflammation, directly impacts ovarian function and female fertility. Female mice were maintained on a “Western style” diet (22% fat, 0.15% cholesterol) or a matched control diet. Body weights were monitored weekly and after 16 weeks fasting insulin levels and glucose tolerance were assessed. Mice were then paired
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25

Larsen, Caroline M., Ilona C. Kokay, and David R. Grattan. "Male pheromones initiate prolactin-induced neurogenesis and advance maternal behavior in female mice." Hormones and Behavior 53, no. 4 (2008): 509–17. http://dx.doi.org/10.1016/j.yhbeh.2007.11.020.

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26

Sasaki, Kazuyo, Kiyoko Okamoto, Kouhei Inamura, Yukiko Tokumitsu, and Makoto Kashiwayanagi. "Inositol-1,4,5-trisphosphate accumulation induced by urinary pheromones in female rat vomeronasal epithelium." Brain Research 823, no. 1-2 (1999): 161–68. http://dx.doi.org/10.1016/s0006-8993(99)01164-6.

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27

Nguyen, Thi Kim Lien, Thi Thuy Hang Truong, Hoang Lai Lam, Hong Yen Nguyen, and Khanh Duy Ngo. "Induced breeding of Sahyadria denisonii using different hormonal substances." Ministry of Science and Technology, Vietnam 65, no. 9 (2023): 46–50. http://dx.doi.org/10.31276/vjst.65(9).46-50.

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Research on spawning stimulation of Sahyadria denisonii was carried out from June 2022 to October 2022 at the Research and Development Center for High-Tech Agriculture with three inducing agents, HCG, Ovaprim, and LHRHa + Domperidone. Each concentration of a hormone used in the experiment was applied on 5 pairs of brood fish. A 1 ml syringe was used for injecting to the anterior region of the dorsal fin by using a single-injection method and the injection timing of fish was 18 hours. Results showed that Ovaprim had an effect on inducing ovulation and laying eggs at a dose of 0.4-0.5 ml/kg of f
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28

Bateman, H. L., and W. F. Swanson. "163 RE-ESTABLISHING REPRODUCTIVE CYCLICITY IN A FEMALE ASIAN SMALL-CLAWED OTTER FOLLOWING SUPRELORIN-INDUCED CONTRACEPTION: A CASE STUDY." Reproduction, Fertility and Development 27, no. 1 (2015): 172. http://dx.doi.org/10.1071/rdv27n1ab163.

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Asian small-clawed otters (ASCO) are a popular species to exhibit in zoological institutions globally, and are found in managed populations in the United States, Europe, Asia, and Australia. Captive breeding of these otters is integral to population sustainability, with management programs using pedigree analyses to make specific breeding recommendations to ensure long-term genetic viability. Because of the familial social structure of ASCO and limited space within zoos, physical separation of animals is not always possible for temporary breeding prevention, and short-term contraception may be
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Knowles, Jindriška, Jakub Vysloužil, Jan Muselík, Vlastimil Stejskal, Jan Kouřil, and Peter Podhorec. "Efficacy of poly (lactic-co-glycolic acid) microparticles as a gonadotropin-releasing hormone analogue delivery system to stimulate ovulation of peled Coregonus peled." Czech Journal of Animal Science 66, No. 8 (2021): 331–38. http://dx.doi.org/10.17221/57/2021-cjas.

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The aim of the study was to determine the efficacy of poly (lactic-co-glycolic acid) microparticles as a carrier of gonadotropin-releasing hormone analogues (GnRHa) for induction of ovulation in peled Coregonus peled. Female peled were injected intraperitoneally with 1) saline solution only (control), 2) mammalian GnRHa at 25 µg/kg body weight, 3) GnRHa in 753-type microparticles at 50 µg/kg, or 4) GnRHa in 653-type microparticles at 50 µg/kg. Blood plasma samples were taken on days 0, 4, 8, and 12 post-injection. All hormone treatments induced synchronous ovulation and higher cumulative ovula
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Wekesa, Kennedy S., and Robert R. H. Anholt. "Pheromone Regulated Production of Inositol-(1, 4, 5)-Trisphosphate in the Mammalian Vomeronasal Organ*." Endocrinology 138, no. 8 (1997): 3497–504. http://dx.doi.org/10.1210/endo.138.8.5338.

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Abstract Social behaviors of most mammals are profoundly affected by chemical signals, pheromones, exchanged between conspecifics. Pheromones interact with dendritic microvilli of bipolar neurons in the vomeronasal organ (VNO). To investigate vomeronasal signal transduction pathways, microvillar membranes from porcine VNO were prepared. Incubation of such membranes from prepubertal females with boar seminal fluid or urine results in an increase in production of inositol-(1, 4, 5)-trisphosphate (IP3). The dose response for IP3 production is biphasic with a GTP-dependent component at low stimulu
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31

COOPER, RALPH L., MICHELLE A. BARRETT, JEROME M. GOLDMAN, GEORGIA R. REHNBERG, W. K. MCELROY, and TAMMY E. STOKER. "Pregnancy Alterations Following Xenobiotic-Induced Delays in Ovulation in the Female Rat." Toxicological Sciences 22, no. 3 (1994): 474–80. http://dx.doi.org/10.1093/toxsci/22.3.474.

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Cooper, R. "Pregnancy Alterations Following Xenobiotic-Induced Delays in Ovulation in the Female Rat." Fundamental and Applied Toxicology 22, no. 3 (1994): 474–80. http://dx.doi.org/10.1006/faat.1994.1053.

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33

Mattioli, Simona, Margherita Maranesi, Cesare Castellini, et al. "Physiology and modulation factors of ovulation in rabbit reproduction management." World Rabbit Science 29, no. 4 (2021): 221–29. http://dx.doi.org/10.4995/wrs.2021.13184.

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Rabbit is an induced ovulatory species, so ovulation takes place after mating. Traditionally, exogenous and synthetic hormonal factors (administered by intramuscular and intravaginal route) such as GnRH and analogues, or different physical procedures (i.e. stimulation by intravaginal cannula) have been used to induce ovulation in females when artificial insemination is applied in rabbit farms. Restriction and public rejection of the use of hormones is leading to the study of the seminal plasma components with potential action on ovulation induction. The aim of the present review is to collect
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34

Kumcu, Merve Sena, Kuru Buket Boğa, and Mushap Kuru. "The rabbit estrous cycle: A comprehensive review." Rats 2, no. 1 (2024): 1–8. https://doi.org/10.5281/zenodo.12599635.

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The reproductive system of the female rabbit is a complex and specialized structure. Its proper functioning is crucial for the success of rabbit breeding. This study provides a detailed examination of the anatomy, physiology, and estrous cycle of the female rabbit reproductive system. The female rabbit reproductive system consists of the vulva, vagina, cervix, uterus, fallopian tubes, and ovaries. Each of these organs has a specific structure and function that are essential for reproduction. Female rabbits reach puberty at an average age of 3.5 months. They become capable of pregnancy at 4-4.5
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Toda, Katsumi, Yoshihiro Hayashi, Masafumi Ono, and Toshiji Saibara. "Impact of Ovarian Sex Steroids on Ovulation and Ovulatory Gene Induction in Aromatase-Null Mice." Endocrinology 153, no. 1 (2012): 386–94. http://dx.doi.org/10.1210/en.2011-1462.

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Female mice deficient in the aromatase gene [aromatase knockout (ArKO)] fail to ovulate owing to an inability to produce estrogens. Here, we demonstrated that sequential administration of adequate amounts of 17β-estradiol (E2), pregnant mare serum gonadotropin, and human chorionic gonadotropin could induce ovulation in immature ArKO mice; nevertheless, significantly fewer oocytes were released into the oviducts in ArKO mice than in wild-type mice. Analysis of ovarian steroids by liquid chromatography coupled with electrospray ionization-tandem mass spectrometry identified a trace amount of E2
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Fan, Xiang, Jing Wang, Yinyin Ma, et al. "Activation of P2X7 Receptor Mediates the Abnormal Ovulation Induced by Chronic Restraint Stress and Chronic Cold Stress." Biology 13, no. 8 (2024): 620. http://dx.doi.org/10.3390/biology13080620.

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Chronic stress has become a major problem that endangers people’s physical and mental health. Studies have shown that chronic stress impairs female reproduction. However, the related mechanism is not fully understood. P2X7 receptor (P2X7R) is involved in a variety of pathological changes induced by chronic stress. Whether P2X7R is involved in the effect of chronic stress on female reproduction has not been studied. In this study, we established a chronic restraint stress mouse model and chronic cold stress mouse model. We found that the number of corpora lutea was significantly reduced in the
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37

Grillo, Giancarlo, Giancarlo Sartorii, Corrado Battisti, et al. "Attempted copulatory behaviour between two phylogenetically unrelated alien species (Coypu, Myocastor coypus, and Pond slider, Trachemys scripta): first evidence." Zoology and Ecology 30, no. 2 (2020): 167–68. http://dx.doi.org/10.35513/21658005.2020.2.10.

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We report the first case of sexual interaction between two phylogenetically unrelated species (coypu Myocastor coypus and pond slider Trachemys scripta, a freshwater pond turtle), both of them non-native in the study area, a remnant coastal wetland of Tyrrhenian, central Italy (41°57'34.0''N 12°02'58.0''E). We inductively propose two different hypotheses (masturbatory act due to intense sperm competition, or behaviour induced by female pheromones) to explain this peculiar observation.
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38

Pratima, Kumari, and Kumari Sangita. "Evaluation of Letrozole as Suitable Ovulating Induction Agent in Patients with PCOS Induced Infertility." International Journal of Pharmaceutical and Clinical Research 14, no. 5 (2022): 635–40. https://doi.org/10.5281/zenodo.13829211.

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<strong>Aim:&nbsp;</strong>To compare the pathological nature of infertility amongst the female population in the Indian subcontinent.&nbsp;<strong>Material &amp; Method:&nbsp;</strong>The main source of data for this study are the women with primary and secondary infertility with anovulation attending the Department of Obstetrics &amp; Gynecology, Nalanda Medical College and Hospital, Patna, Bihar, India. This is a prospective study with a total of 200 women satisfied the inclusion and exclusion criteria of the study. The present study consists of cases of infertility due to anovulation which
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39

Marie, M. "Mating-induced luteinizing hormone surge and ovulation in the female camel (Camelus dromedarius)." Biology of Reproduction 35, no. 4 (1986): 792–98. http://dx.doi.org/10.1095/biolreprod35.4.792.

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40

Kim, Jaeyeon, Indrani C. Bagchi, and Milan K. Bagchi. "Signaling by Hypoxia-Inducible Factors Is Critical for Ovulation In Mice." Endocrinology 150, no. 7 (2009): 3392–400. http://dx.doi.org/10.1210/en.2008-0948.

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The steroid hormone progesterone, acting via its nuclear receptor, is a major regulator of the process of ovulation. Female mice lacking progesterone receptor (PGR) exhibit an anovulatory phenotype due to failure in follicular rupture. To identify the PGR-regulated pathways that control ovulation, we analyzed global changes in gene expression in the ovaries of wild-type and Pgr-null mice subjected to gonadotropin-induced superovulation. Our analysis uncovered several genes whose expression was reduced in the Pgr-null ovaries compared with the wild-type ovaries immediately preceding ovulation.
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41

Fan, Heng-Yu, Annalouise O'Connor, Manami Shitanaka, Masayuki Shimada, Zhilin Liu та JoAnne S. Richards. "β-Catenin (CTNNB1) Promotes Preovulatory Follicular Development but Represses LH-Mediated Ovulation and Luteinization". Molecular Endocrinology 24, № 8 (2010): 1529–42. http://dx.doi.org/10.1210/me.2010-0141.

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Abstract Wingless-type mouse mammary tumor virus integration site family (WNT)/β-catenin (CTNNB1) pathway components are expressed in ovarian granulosa cells, direct female gonad development, and are regulated by the pituitary gonadotropins. However, the in vivo functions of CTNNB1 during preovulatory follicular development, ovulation, and luteinization remain unclear. Using a mouse model Ctnnb1(Ex3)fl/fl;Cyp19-Cre (Ctnnb1(Ex3)gc−/−), expressing dominant stable CTNNB1 in granulosa cells of small antral and preovulatory follicles, we show that CTNNB1 facilitates FSH-induced follicular growth an
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42

Medan, MS, G. Watanabe, K. Sasaki, et al. "Ovarian and hormonal response of female goats to active immunization against inhibin." Journal of Endocrinology 177, no. 2 (2003): 287–94. http://dx.doi.org/10.1677/joe.0.1770287.

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This study was conducted to evaluate the effect of active immunization against inhibin on hormonal levels and the ovulation rate in goats. Ten adult Shiba goats (Capra hircus) in two groups were used in this study. The first group was injected with inhibin vaccine (immunized, n=5) and the second group was injected with Freund's adjuvant (control, n=5) followed by three booster injections at 4-week intervals. After the third booster injection, three consecutive periods of oestrus were induced using prostaglandin F(2alpha) at intervals of 11 days. Blood samples were collected at 2-6 h intervals
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43

Kasinath, Hadimur. "Evaluation Of Ovulation Effect of Pippalyadi Yoga in Letrozole Induced Polycystic Ovarian Syndrome." International Journal of Pharmacy and Biological Sciences (IJPBS) 13, no. 3 (2023): 116–21. https://doi.org/10.5281/zenodo.10430447.

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Abstract Infertility is typically defined as inability or failure to conceive after one year period of continuous exposure to normal unprotected coitus. Mainly the causes in females are anouvulation, blocked fallopian tube, hormonal imbalance. Common in males: low sperm count, abnormal sperm morphology. In this regard we took Pippalyadi yoga is herbal formulation mentioned in &ldquo;Chakradatta&rdquo; indicated in Vandhya (disorders of female Infertility). Hence this formulation are expected to contribute positive and better result PCOS. In the present study letrozole induced PCOS method was f
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44

Lenis, Gustavo, Luis F. Restrepo, Juan C. Rivera, Fabián Monsalve, and Pablo Cruz Casallas. "Reproducción inducida y producción de alevinos de Sabaleta Brycon henni: determinación del tiempo de latencia utilizando extracto de hipófisis de carpa." Revista Colombiana de Ciencias Pecuarias 22, no. 2 (2009): 13. http://dx.doi.org/10.17533/udea.rccp.324381.

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Summary This research was conducted in the San José del Nus fish farm, located in the Municipality of San Roque (department of Antioquia). This study began in 2002 with the capture and suitability of 100 wild breeding fish batches coming from three sub-basins near to San José del Nus fish farm. In 2003, another 80 specimens were captured and utilized for first hormonal induction trials by stimulating final maturation and ovulation with two doses of Carp pituitary extract (CPE) (0.5 + 5.0 mg/kg B.W.). Dry extrusion was used in the three groups of fish to obtain gametes. Spermiation and final ma
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Rodger, JC, WG Breed, and JH Bennett. "Gonadotrophin-induced oestrus and ovulation in the polyovulatory marsupial Sminthopsis crassicaudata." Reproduction, Fertility and Development 4, no. 2 (1992): 145. http://dx.doi.org/10.1071/rd9920145.

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Sminthopsis crassicaudata is a small (approximately 16 g) polyovulatory dasyurid marsupial which has the potential to become an important model species. This study examined the use of exogenous hormone treatment to manipulate the breeding of S. crassicaudata and as a means to obtain timed developmental stages for further study. Two thirds (21/32) of the females treated with 1.0 or 5.0 I.U. of pregnant mare serum gonadotrophin (PMSG) had ovulated when the contents of their reproductive tracts were examined 5 or 6 days later. Only one of eight females treated with 0.2 I.U. PMSG had ovulated in t
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46

Luque, E. M., V. P. Carlini, L. M. Vincenti, et al. "Effects of hexarelin (a ghrelin analogue) on fertilisation and the pre- and postnatal development of mice." Reproduction, Fertility and Development 22, no. 6 (2010): 926. http://dx.doi.org/10.1071/rd09231.

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Ghrelin (Ghr) has been associated with reproductive physiology and pre- and postnatal development. The objectives of the present study were to evaluate the effects of hexarelin (HEX; 100 or 200 µg kg−1 day−1), a therapeutic Ghr analogue, on: (1) embryo development 60 h post ovulation, induced pharmacologically, in pregnant mice; (2) the physical, neurobiological and sexual development of offspring of female mice injected with HEX during the first, second or third week of pregnancy or throughout the entire pregnancy; and (3) adult memory acquisition in these offspring. We also evaluated the eff
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47

Meijs-Roelofs, H. M. A., P. Kramer, and P. Osman. "Precocious ovulation induced by human chorionic gonadotrophin in the immature female rat: comparison of follicle growth induced by treatment with human chorionic gonadotrophin and by electrical stimulation of the hypothalamus." Journal of Endocrinology 106, no. 1 (1985): 61–66. http://dx.doi.org/10.1677/joe.0.1060061.

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ABSTRACT Precocious first ovulation, preceded by an endogenous preovulatory LH surge, could be predictably induced in immature female rats by administering repeated injections of human chorionic gonadotrophin (hCG). Administration of a dose of 0·05–0·075 i.u. hCG, four times a day from day 28 to day 31 of age resulted in a highly constant ovulatory response: at 4·0±0·0 days after the start of treatment 7·7±0·3 (n = 15) ova were found. Use of a higher dose of hCG (0·1 i.u.) resulted in lower numbers of ova (5·6±0·4, n = 7; P&lt;0·005) whereas use of a lower dose of hCG (0·025–0·038 i.u.) result
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48

Al-Muala, I. K., and B. M. Al-Jiboori. "Effect of licorice extract on ovulation induction in immature female mice." Journal of Biotechnology Research Center 4, no. 1 (2010): 118–29. http://dx.doi.org/10.24126/jobrc.2010.4.1.106.

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The objective of this study was to assess the effect of licorice extract (LE) on induction of ovulation and on the structural changes of ovary, oviduct and uterus. Divided into 6 groups: G1, G2, G3, G4, G5 and G6 (14 animals for each). G1 received 1g/kg bwt/day of licorice extract for 2 weeks. G2 were fed with 0.5g/kg bwt/day of licorice extract for 2 weeks. Mice fed on normal diet and tap water (without LE) were regarded as control group (G3). G4 and G5 received the same doses of G1 and G2 respectively for 4 weeks. G6 received tap water only and considered as a control for G4 and G5. Before t
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49

WK Lee, Victor, and William RGibson. "Ovulation Rate and Inhibin Levels in Gonadotrophin-treated Mice." Australian Journal of Biological Sciences 38, no. 1 (1985): 115. http://dx.doi.org/10.1071/bi9850115.

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Ovarian follicular growth was induced in immature female mice with varying doses of pregnant mare's serum gonadotrophin. The numbers of ovulations were determined either by counting tubal oocytes or corpora lutea in the ovary. Ovarian and circulatory levels of inhibin rose progressively with increasing doses of PMSG and a positive correlation (P &lt; O� 0 I) was found between circulating inhibin levels and ovulation rate. The latter correlation makes it likely that the growing preovulatory ovarian follicles are the predominant source for the secretion of inhibin into the circulatory system.
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50

Morgan, Caurnel, Henryk F. Urbanski, Wei Fan, Huda Akil, and Roger D. Cone. "Pheromone-induced anorexia in male Syrian hamsters." American Journal of Physiology-Endocrinology and Metabolism 285, no. 5 (2003): E1028—E1038. http://dx.doi.org/10.1152/ajpendo.00010.2003.

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Transition from long days (LDs) to short days (SDs) triggers seasonal obesity in Syrian hamsters. We report here that SD-exposed males housed near females exhibit obesity resistance, episodic weight loss, and reduced adiposity. Negative energy balance is achieved by reduced eating, elevated motor activity, and increased caloric efficiency without metabolic compensation. Circulating leptin, insulin, testosterone, corticosterone, and cortisol are normal or reduced in obesity-resistant hamsters. When males are housed in chambers that block physical, visual, and auditory, but not pheromonal, signa
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