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Kansas Agricultural Experiment Station Research Reports
1994; Kansas Agricultural Experiment Station contribution; no. 95-141-S; Report of progress (Kansas Agricultural Experiment Station); 716; PGF; GnRH; Ovulation synchronization; Pregnancy rates
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Full-Text Articles in Life Sciences
Use Of Gnrh And Pgf For Synchronized Ovulation And Fixed-Time Inseminations (1994), Y. Kobayashi, Jeffrey S. Stevenson
Use Of Gnrh And Pgf For Synchronized Ovulation And Fixed-Time Inseminations (1994), Y. Kobayashi, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Holstein cows and virgin heifers were treated with GnRH and PGF in a novel 2a ovulation synchronization protocol, which involves one fixed-time insemination. One injection of GnRH is given on a Monday morning, followed in 7 days with an injection of PGF . Approximately 32 hr later, ovula- 2a tion is induced with a second injection of GnRH, and one insemination is made 18 hr later. Control cattle were given one injection of PGF and inseminated at estrus. Preg- 2a nancy rates measured between 28 and 35 days after insemination by ultrasonography were slightly, but not significantly, higher in controls …