FERTILIZATION RATE AND EMBRYONIC SURVIVAL IN DAIRY COWS IN RELATION TO TRANSFERRIN AND J ANTIGEN GROUPINGS OF SIRES AND DAMS

in Reproduction

Summary.

The sera of ninety-six reproductively normal cows and twenty-sex artificial insemination bulls were typed for transferrin and for J antigen. Fertility of the cows was measured by examination of the genital tracts between 2 and 26 days after insemination at post-mortem or laparotomy. No significant relationship was observed between fertility and transferrin type or J antigen in these experimental animals. The results of approximately 90,000 inseminations with semen from the twenty-six bulls were also studied in relation to these types and again there was no useful association.

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     An official journal of

    Society for Reproduction and Fertility

 

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