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Encyclopedia of reproduction
Ernst Knobil,J. D. Neill +1 more
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The article was published on 1998-01-01 and is currently open access. It has received 702 citations till now.read more
Citations
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Journal ArticleDOI
Developmental expression and estrogen responses of endocrine genes in juvenile yellow perch (Perca flavescens).
TL;DR: Findings show that growth is accompanied by increases in pituitary gh, liver igf1b and liver esr1 and esr2a mRNAs in juvenile yellow perch.
Journal ArticleDOI
Progestogen treatments for cycle management in a sheep model of assisted conception affect the growth patterns, the expression of luteinizing hormone receptors, and the progesterone secretion of induced corpora lutea
C. Letelier,Rosa A. García-Fernández,I. Contreras-Solis,María Angeles Montoro Sánchez,Pilar García-Palencia,B. Sánchez,Antonio Gonzalez-Bulnes,Juana M. Flores +7 more
TL;DR: The current study indicates the existence of deleterious effects from progestogens on functionality of induced corpora lutea, in a sheep model.
Journal ArticleDOI
Administration of antiprogestin J956 for contraception in bears: a pharmacological study.
TL;DR: Investigation of the pharmacological characteristics of antiprogestin J956 to establish an efficient contraceptive protocol for administration of J956 in captive bears found it efficiently prevented implantation of early embryos in eight female captive bears.
Journal ArticleDOI
Effects of methanolic extract of Asparagus pubescens root on sexual behavior and pituitary hormone secretion on Wistar rats during pregnancy and lactation
TL;DR: The results taken together indicate that the contraceptive effects of the extract may be exerted through interference with neural mechanisms that control preovulatory hormone release and sexual behavior.
Journal ArticleDOI
Morphometric evaluation of the spermatogenesis in trahira Hoplias malabaricus (Bloch) (Characiformes, Erythrinidae)
TL;DR: Sertoli cell supporting capacity, meiotic index, and the number of spermatogonial mitotic generations of this fish were determined and values were within the generation range of those already found in freshwater teleosts of external fertilization.
References
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Book ChapterDOI
Seasonal breeding:nature's contraceptive.
G A Lincoln,Roger V. Short +1 more
TL;DR: The seasonal cycle highlights the seasonal changes in daylight length, rutting behavior, testicular diameter, sexual skin flush, and concentrations of plasma follicle-stimulating hormone, prolactin, and testosterone in a group of rams throughout the year.
Journal ArticleDOI
The physiological responses of anovulatory ewes to the introduction of rams: a review.
TL;DR: Ewes of many breeds can be stimulated to ovulate by the reintroduction of rams and appear to be effected both through a delay in the onset of the LH surge and through a direct action of progesterone on the ovary.
Journal ArticleDOI
Factors affecting the secretion of luteinizing hormone in the ewe.
TL;DR: LH is secreted as discrete pulses throughout all stages of the reproductive cycle of the ewe, including pre‐pubertal, seasonal and lactational anoestrus, and the luteal and follicular phases of the oestrous cycle.
Nutritional influences on reproduction in mature male sheep and goats
TL;DR: In this article, it was shown that nutritional signals exert powerful effects on the reproductive system of mature male ruminants, and the responses are partly independent of changes in gonadotrophin secretion.
Journal Article
Nutritional influences on reproduction in mature male sheep and goats.
TL;DR: In this article, it was shown that nutritional signals exert powerful effects on the reproductive system of mature male ruminants, and the responses are partly independent of changes in gonadotrophin secretion.