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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
Sperm maturation in the epididymis: a new look at an old problem
TL;DR: The osmotic challenges facing maturing spermatozoa and their responses to them are discussed in relation to the concept of sperm maturation, defined as the increased ability of more distally recovered epididymal spermutozoa to fertilize eggs when inseminated into the female tract.
Journal ArticleDOI
Life Span Extension in Humans is Self-Reinforcing: A General Theory of Longevity
James R. Carey,Debra S. Judge +1 more
TL;DR: The article describes the foundational principles and the main phases of a model for the evolution of longevity mediated through social organization, and applies the concept specifically to human populations.
Book ChapterDOI
Multihormonal control of vitellogenesis in lower vertebrates.
Alberta Maria Polzonetti-Magni,Gilberto Mosconi,Laura Soverchia,Sakae Kikuyama,Oliana Carnevali +4 more
TL;DR: How fundamental nonmammalian models appear to be, for vitellogenesis research, addressed to clarifying the yolkless egg and the evolution of eutherian viviparity is considered.
Journal ArticleDOI
Biogenesis of sperm perinuclear theca and its role in sperm functional competence and fertilization.
Richard Oko,Peter Sutovsky +1 more
TL;DR: Data collected on resident perinuclear theca proteins, SubH2Bv, RAB2, PAWP and the four core somatic histones, is used to substantiate hypotheses that the subacrosomal layer is assembled relatively early in spermiogenesis and the postacrosome sheath is assembled later.
Journal ArticleDOI
Effects of larval-juvenile treatment with perchlorate and co-treatment with thyroxine on zebrafish sex ratios.
TL;DR: Exogenous thyroid hormone plays a role in the establishment of gonadal sex phenotype during early development in zebrafish and co-treatment with T4 advanced the onset of spermatogenesis in males.
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.