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Effect Of Standing Estrus Prior To An Injection Of Gnrh On Steriodogenic Enzyme Expression In Luteal Tissue, Kaycee Gebhart
Effect Of Standing Estrus Prior To An Injection Of Gnrh On Steriodogenic Enzyme Expression In Luteal Tissue, Kaycee Gebhart
The Journal of Undergraduate Research
Cows detected in estrus around the time of fixed-time AI had increased pregnancy success and progesterone concentrations. Additionally, GnRH following onset of estrus influenced LH pulse frequency and CL formation/function. Therefore our objective was to determine steriodogenic enzyme expression within luteal tissue of cows that were or were not detected in standing estrus prior to an injection of GnRH. Cows were synchronized with the CO-Synch protocol (day -9 100 mg GnRH; day -2 25 mg PGF2α; day 0 100 mg GnRH). Estrus was detected with the HeatWatch system. Location and size of the ovulatory follicle was determined on day 0 …