Neuroendocrine regulation of the estrous cycle and seasonal breeding in the ewe.
Sandra J. Legan,Fred J. Karsch +1 more
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This article is published in Biology of Reproduction.The article was published on 1979-02-01 and is currently open access. It has received 141 citations till now. The article focuses on the topics: Estrous cycle.read more
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Journal ArticleDOI
The melatonin rhythm: both a clock and a calendar.
TL;DR: The paper summarizes the 3 patterns of nocturnal melatonin production that have been described and shows that the circadian production and secretion of melatonin by the pineal gland can impart both daily and seasonal, i.e., calendar, information to the organism.
Book ChapterDOI
Neuroendocrine basis of seasonal reproduction.
Fred J. Karsch,Eric L. Bittman,Douglas L. Foster,Robert L. Goodman,Sandra J. Legan,Jane E. Robinson +5 more
TL;DR: This chapter discusses the strategy of seasonal breeding, the role of photoperiod in timing the annual reproductive cycle, the hypothalamo-pituitary mechanisms that mediatePhotoperiodic regulation of estrous cyclicity, and the photoperperiodic pathway to luteinizing hormone (LH) pulse generator.
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
Pineal Melatonin Secretion Drives the Reproductive Response to Daylength in the Ewe
TL;DR: It is concluded that the pineal mediates the reproductive response of the ewe to inductive photoperiods through its daily rhythm of melatonin secretion.
Journal ArticleDOI
Effects of dietary energy on control of luteinizing hormone secretion in cattle and sheep
TL;DR: Understanding of how the central nervous system transduces information about nutritional status into neuroendocrine signals that control reproduction in cattle and sheep is limited by a lack of information concerning the nature of neurons controlling LHRH release in these species.