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An Improved Method for Artificial Insemination of the Bovine by Vaginal Deposition of the Semen

University of Nebraska

Abstract

It has become common practice in bovine insemination to inject the semen into the cervix of the cow on the assumption that such a procedure is superior to deposition of the semen in the vagina. Certainly the spermatozoa when injected into the cervix are closer to the ovum than when deposited in the vagina. It seems likely that if minimum quantities of semen were used that cervical insemination might be superior. In general, the comparisons that have been made between natural services and cervical inseminations have indicated a smaller number of inseminations for conception from the cervical method than from natural services. There are, however, few data to support this doctrine.

Backstrom (1) working with 78 heifers, 39 in each group, reported 1.63 inseminations per conception for those individuals which were inseminated artificially (semen deposited in the cervix), and 2.08 services per conception for those bred naturally. The year following the experiments were repeated with 80 heifers, 40 in each group.