Influence of dietary energy levels on
reproductive function and fertility
in yearling beef heifers

Influence of dietary energy levels on reproductive function and fertility in yearling beef heifers

Utter, S.D.; Corah, L.R.

Conference paper

Publication Date: 1994

Conference: Cattlemen's Day, 1994, Kansas State University, Manhattan, KS, March 4, 1994
Starting Page: 104, Ending Page: 106
Publisher: Kansas State University. Agricultural Experiment Station and Cooperative Extension Service

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Abstract:

Fifty-nine heifers were allotted to be fed at two different energy levels. One group gained 1.77 lb/hd/day, and the other 1.25 lb/hd/day. Estrus was synchronized with the MGA/prostaglandin system. After MGA removal, ovarian development was monitored daily by ultrasound (10 per group) until estrous was detected following the PGF injection. Heifers were inseminated artificially based on estrus behavior. Faster gaining heifers had higher final body condition scores and greater changes in body condition score. The high energy diet caused a slight (P=.11) decrease in AI pregnancy rate for purebred heifers.

Keywords: Beef; Beef heifers; Energy levels; Ovarian function; Fertility

URL for this item: http://hdl.handle.net/2097/4983

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