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Kansas Agricultural Experiment Station Research Reports
2000; Kansas Agricultural Experiment Station contribution; no. 00-287-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 850; Beef; Cows; AI; Estrus-Ovulation synchronization; GnRH; PGF2α; Progestin
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Full-Text Articles in Life Sciences
Supplemental Progestin Increases Pregnancy Rates In Suckled Beef Cows, G.C. Lamb, J.A. Cartmill, B.A. Hensley, S.E. El-Zarkouny, T.J. Marple, Jeffrey S. Stevenson, David M. Grieger
Supplemental Progestin Increases Pregnancy Rates In Suckled Beef Cows, G.C. Lamb, J.A. Cartmill, B.A. Hensley, S.E. El-Zarkouny, T.J. Marple, Jeffrey S. Stevenson, David M. Grieger
Kansas Agricultural Experiment Station Research Reports
In two experiments, combining a source of progestin with the ovulation synchronization protocol using gonadotropin-releasing hormone plus prostaglandin F2α (GnRH + PGF2α) tended to increase or statistically increase pregnancy rates in suckled cows compared to GnRH + PGF2α alone. These improvements were accomplished without any detected estrus when cows were inseminated and received a second injection of GnRH at 48 hr after PGF2α.