Author : Teri L. Martin
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.:/5 (222 download)
Book Synopsis Response of the Bovine Corpus Luteum to Exogenous Gonadotropin-releasing Hormone During the Estrous Cycle by : Teri L. Martin
Download or read book Response of the Bovine Corpus Luteum to Exogenous Gonadotropin-releasing Hormone During the Estrous Cycle written by Teri L. Martin and published by . This book was released on 1988 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two experiments were conducted to investigate the effects of gonadotropin-releasing hormone (GnRH), administered twice during the same estrous cycle, on bovine luteal function. Eight mature beef cows, each cow serving as her own control, were injected intravenously (i.v.) with saline on days 2 and 8 of the cycle (day of estrus=day 0 of the cycle), then with 10Oug GnRH on days 2 and 8 of the subsequent cycle. Jugular blood samples were taken immediately prior to an injection and at 15, 30, 45, 60, 120 and 240 min postinjection to characterize changes in serum luteinizing hormone (LH). Blood was also collected on alternate days after an injection until day 16 of the cycle, to characterize serum progesterone levels. Treatment with GnRH did not significantly alter serum progesterone concentrations. Although GnRH caused release of LH on days 2 and 8, the quantity of LH released was significantly greater on day 8 (P