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Journal of Dairy Science Vol. 50 No. 3 378-380
© 1967 by American Dairy Science Association ®
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Effects of High Levels of Exogenous Testosterone Propionate on Bovine Semen

M. Richkind, S. Matsuyama1 and P. T. Cupps

Department of Animal Husbandry, University of California, Davis

ABSTRACT

In a 16-month old inbred bull, supplementary testosterone propionate given at 100 mg/day for 12 wk caused a decrease in the number of tailless sperm and an increase in the number of coiled-tailed sperm. In another inbred bull 28 months of age, 200 mg/day caused the production of sperm with abnormal heads, midpieces, and tails. Both levels of the hormone disrupted and partially inhibited spermatogenesis, and caused a rise in fructose and citric acid in the semen.

FOOTNOTES

1 Present address: Chugoku Branch, National Institute of Animal Health, Tamaki, Wadayama-Cho, Asako-Gun, Hyogo-Ken, Japan.






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Copyright © 1967 by the American Dairy Science Association ®.