Fixed-time inseminaton of suckled beef cows. 2. Cosynch and progesterone

Fixed-time inseminaton of suckled beef cows. 2. Cosynch and progesterone

Stevenson, J.S.; Lamb, G.C.; Cartmill, J.A.; Hensley, B.A.; Marple, T.J.

Conference paper

Publication Date: 1999

Conference: Cattlemen's Day, 1999, Kansas State University, Manhattan, KS, March 5, 1999
Starting Page: 65, Ending Page: 67
Publisher: Kansas State University. Agricultural Experiment Station and Cooperative Extension Service

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Abstract:

The Cosynch protocol (GnRH 7 days before and again 48 h after PGF2" with AI at the second GnRH injection) produced pregnancy rates in suckled beef cows that exceeded 50% without heat detection and with only three handlings of all cows. The addition of an intravaginal progesterone insert to the Cosynch protocol improved pregnancy rates in two of the three breeds of cows studied.

Keywords: Beef; Cows; AI; Estrus-ovulation synchronization; GnRH; PGF2

URL for this item: http://hdl.handle.net/2097/4711

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