A.S. Series 72-4
Artificial insemination (A.I.) has been commercially available to beef producers for nearly 20 years. However, most beef cattlemen do not take advantage of A.I. because of the labor and management required during the long breeding season. If the breeding season could be condensed into a few days through estrus synchronization, this disadvantage could be overcome.
Most methods of estrus synchronization have involved the feeding of a synthetic progestin for several days. These compounds prevent estrus and ovulation until 2 to 8 days following their withdrawal. However, reduced fertility at the first estrus following withdrawal has been a problem. It is not understood why fertility is subnormal at this estrus.
The purpose of this study was to determine the effect of melengestrol acetate (MGA), a synchronizing compound, on the rate of ovum transport in the beef cow. Egg development, ovarian conditions and fertility were also observed.
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South Dakota State University
Copyright © 1972 South Dakota State University
Reed, J. D. and Rich, T. D., "MGA Influence on Ovum Transport and Fertility in Beef Cows" (1972). South Dakota Cow-Calf Field Day Proceedings, 1972. 7.