Abstract

Eight cull Hereford cows were given 200-mg. injections of testosterone proprionate repository (Haver-Lockhart, Shawnee, KS) every other day for 20 days (10 injections). Four cows were given weekly booster injections with the same testosterone proprionate; the other four were injected every three weeks with testosterone enanthate (sigma Chemical Co., St. Lois, MO.). Each cow was equipped with a chin-ball marker and each was used to detect heat in other cows. The detection period lasted approximately 45 days. Testosterone-treated cows served satisfactorily as heat detectors; those given boosters of testosterone proprionate marked more cows in heat than those given testosterone enanthate.

Keywords: Report of progress (Kansas State University. Agricultural Experiment Station), 291, Cattlemen's Day, 1977, Beef, Testosterone, Heat detection

How to Cite:

Laaser, G. & Kiracofe, G., (1977) “Testosterone-treated cows to aid in heat detection”, Kansas Agricultural Experiment Station Research Reports 1(1), i-ii. doi: https://doi.org/10.4148/2378-5977.2698