Describe the importance and process of animal reproduction. 2. List the List and describe the phases of the estrous cycle. 5. Explain PowerPoint Projector. Polyestrus: Uniform distribution of estrous cycles which occur regularly throughout the year. Ex: cattle, swine, rodents. ESTROUS CYCLE. Seasonally polyestrus. Differences in lengths of estrous cycles among species (Table ) are Many small animals are subject to predation, and cannot afford the luxury of lengthy.
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Neuroendocrine and endocrine factors involved in the regulation of reproductive cycles in domestic animals are discussed. Although research data from many species are considered, estrous cycle in animals ppt is placed on their relevance for the cow, sow, ewe and, to a lesser extent, the mare.
Literature cited is not designed to be complete, but rather to be representative of the large volume of material which has been written on the subject. Gonadotropin-releasing hormone is synthesized and secreted in response to various exteroceptive stimuli, but both its release and its estrous cycle in animals ppt on the anterior pituitary are modified by feedback of target gland hormones. A modulating role for nonsteroidal regulators such as inhibin has yet to be proven.
Prostaglandins are important for corpus luteum regression and ovulation. The relative roles of the gonadotropins and the above substances in hypothalamic, adenohypophyseal and ovarian function are considered. General mention is made of mechanisms of hormonal action. National Center for Biotechnology InformationU. Journal List Can Vet J v.
Can Vet J. Copyright and License information Disclaimer. Copyright notice. This article has been cited by other articles in PMC. Abstract Neuroendocrine and endocrine factors involved in the regulation of reproductive cycles in domestic animals are discussed.
A priming effect of luteinizing hormone releasing factor on the anterior pituitary gland in the female rat. J Endocrinol. Progesterone secretion by the sheep corpus luteum after repeated infusions of luteinizing hormone and human chorionic gonadotrophin.
Induction of ovulation in pigs with gonadotrophin releasing hormone. J Anim Sci. Estrous cycle in animals ppt of steroids by granulosa cells of the porcine ovary in vitro. J Reprod Fertil. Frequency of ovarian follicular cysts, reasons for culling, and fertility in Holstein-Friesian cows given gonadotropin-releasing hormone at two weeks after parturition.
Am J Vet Res. Contribution of granulosa cells and follicular fluid to ovarian estrogen secretion in rhesus monkey in vivo. Evidence for inhibin-like activity in bovine follicular fluid. Pituitary control of the ovine izombie astro burger vodlocker luteum. J Dairy Sci. Reversal of indomethacin blockade of ovulation in gilts by prostaglandins. Hormonal control iogear print server airprint 17 beta-estradiol biosynthesis in proestrous rat estrous cycle in animals ppt Sequential patterns of circulating luteinizing hormone and follicle-stimulating hormone in female sheep from early postnatal life through the first estrous cycles.
Effect of a synthetic gonadotropin-releasing hormone on plasma concentrations of luteinizing hormone in ponies. Binding of human chorionic gonadotropin and response of cyclic nucleotides to luteinizing hormone in luteal tissue from rats treated with prostaglandin F2alpha. Luteinization of bovine granulosa cells and corpus luteum formation associated with loss of androgen-aromatizing ability. FSH and LH response to gonadotropin-releasing hormone during the ovine estrous cycle and following progesterone administration.
Observations on the bovine pituitary gland. Architecture and cytology with special reference to basophil cell function. Cornell Vet. Control of the preovulatory endocrine events in the ewe: The biosynthesis of estrogens by cow follicles. Prostaglandin F 2 identified as a luteolytic hormone in sheep.
Nat New Biol. Ovarian effects of bovine follicular fluid treatment in sheep and cattle. Biol Reprod. The ovarian follicle of the sheep: Sites of steroid estrous cycle in animals ppt in ovine graafian follicles in culture. Role of endogenous primate LH in maintaining corpus luteum function in the monkey. J Clin Endocrinol Metab. The site of follicle stimulating and luteinising hormone production in the rat pituitary. A study on the cytology of the adenohypophysis of the dog.
Receptors for gonadotrophin and prostaglandin F2 alpha in bovine corpora lutea of early, mid and late luteal phase. Acta Endocrinol Copenh Jul; 91 3: Gonadotropin-releasing hormone surge in pro-oestrous rats. Studies on serum oestrogen and progesterone levels during the oestrous cycle and early pregnancy in mares.
Equine Vet J. Aspects of hypothalamic regulation of the pituitary gland. Hypothalamic regulatory hormones. Gonadotropin-releasing hormone: Fertil Steril. The oestrous cycle of the cow: Acta Endocrinol Copenh Sep; 86 1: Vet Rec.
Arachidonic acid and bocine corpus luteum function Proc Soc Exp Biol Med. Ann Biol Anim Biochim Biophys. Pre-ovulatory changes in cyclic AMP and prostaglandin concentrations in follicular fluid of gilts.
Pathways of steroid biosynthesis in the intact Graafian collicle of mares in oestrus. Associated Data Supplementary Materials. Open in a separate window. Support Center Support Center. External link.