Influence of standing estrus before an injection of GnRH during a beef cattle fixed-time AI protocol on LH release, subsequent concentrations of progesterone, and steriodogenic enzyme expression

Beef cows that exhibit estrus before fixed-time AI have been reported to have increased pregnancy success and increased concentrations of progesterone during the subsequent estrous cycle. Therefore, these experiments were conducted to evaluate if initiation of standing estrus before an injection of...

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Bibliographic Details
Published in:	Domestic animal endocrinology Vol. 42; no. 1; pp. 11 - 19
Main Authors:	Fields, S.D., Gebhart, K.L., Perry, B.L., Gonda, M.G., Wright, C.L., Bott, R.C., Perry, G.A.
Format:	Journal Article
Language:	English
Published:	United States Elsevier Inc 2012
Subjects:	3-Hydroxysteroid Dehydrogenases - blood 3-Hydroxysteroid Dehydrogenases - genetics Animals Cattle - physiology Cholesterol Side-Chain Cleavage Enzyme - blood Cholesterol Side-Chain Cleavage Enzyme - genetics Cluster Analysis Corpus Luteum - drug effects Corpus Luteum - physiology Corpus luteum function Estrus - physiology Female GnRH Gonadotropin-Releasing Hormone - pharmacology Insemination, Artificial - methods Insemination, Artificial - veterinary LH pulses Luteinizing Hormone - blood Luteinizing Hormone - secretion Male Ovarian Follicle - diagnostic imaging Ovarian Follicle - drug effects Ovarian Follicle - metabolism Ovarian Follicle - physiology Pregnancy Progesterone Progesterone - blood Real-Time Polymerase Chain Reaction - veterinary Receptors, LH - blood Receptors, LH - genetics Reverse Transcriptase Polymerase Chain Reaction - veterinary RNA - chemistry RNA - genetics Ultrasonography LH pulses Progesterone GnRH Corpus luteum function
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