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Comparative Efficiency of Intracervical and Intra-Uterine Methods of Insemination in Dairy Cattle¹

Department of Dairy Husbandry, University of Missouri, Columbia

ABSTRACT

A study of the comparative efficiency of intracervical and intrauterine semen deposition in inseminations with dairy cattle was made.

Percentage non-returns were significantly higher with the intrauterine method on total services and repeat breedings. The difference on first services was not significant.

With semen 24 to 36 hr. old, the intrauterine method showed a significant difference of 13.1 per cent greater non-returns for cows inseminated under field conditions.

Intracervical percentage non-returns were significantly lower with semen used 24 to 36 hr. after collection than with semen used within 12 hr. after collection; with intrauterine insemination the decrease was not significant.

The data indicate that as a general insemination technique intrauterine breeding gives better results than deposition of semen in the posterior cervix, via the speculum.

¹ Contribution from the Department of Dairy Husbandry, Missouri Agricultural Experiment Station Journal Series no. 1224.