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2010; Kansas Agricultural Experiment Station contribution; no. 11-129-S; Report of progress (Kansas Agricultural Experiment Station and Cooperative Extension Service); 1039; Dairy; Corpus luteum; Equine chorionic gonadotropin; Follicle; Progesterone; timed artificial insemination (AI)
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Full-Text Articles in Animal Sciences
Ovarian Characteristics, Serum Hormoneconcentrations, And Fertility In Lactating Dairy Cows Inresponse To Equine Chorionic Gonadotropin (2010), Stephanie Leeann Pulley, L.D. Wallace, H.I. Mellieon, Jeffrey S. Stevenson
Ovarian Characteristics, Serum Hormoneconcentrations, And Fertility In Lactating Dairy Cows Inresponse To Equine Chorionic Gonadotropin (2010), Stephanie Leeann Pulley, L.D. Wallace, H.I. Mellieon, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
The objective of this study was to evaluate the effects of equine chorionic gonadotropin (eCG) on various characteristics associated with an effective timed artificial insemination (AI) protocol in lactating dairy cows. Cows (n = 121) in a single herd were treated with 2 injections of prostaglandin F2α(PGF2α) 14 days apart (Presynch), with the second injection administered 11 days before the onset of a timed AI protocol. Cows received either saline or 400 IU eCG concurrent with the PGF2αinjection of the Ovsynch protocol (injection of gonadotropinreleasing hormone or GnRH, 7 days before and 48 to 56 hours after PGF2αwith insemination occurring …