J. Anim Sci.
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J. Anim Sci. 1956. 15:119-124.
© 1956 American Society of Animal Science
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A Study of Vaginal and Uterine Prolapse in Hereford Cattle1

R. R. Woodward and J. R. Quesenberry2

United States Department of Agriculture

Abstract

A total of 93 cases of vaginal and uterine prolapse occurred in 7859 births in the range Hereford herd at the United States Range Livestock Experiment Station at Miles City, Montana, during the period 1935–54, inclusive. Yearly variations in the percentage incidence ranged from 0.0 percent to 2.7 percent. The incidence at this station was found to be significantly higher than the incidence at the North Montana Branch Station at Havre, Montana, when births from cows of similar breeding were considered for the same years. The lower plane of nutrition at the Miles City station may have been responsible for the higher incidence of prolapse.

Differences in the occurrence of prolapse were not statistically significant between age groups of cows. There was a tendency for a higher percentage of cases to occur at the time of the first calving and after the cow reached seven years of age.

Significant line differences in the incidence of prolapse suggest an hereditary susceptibility for this characteristic. It would follow that vaginal and uterine prolapse, generally recognized to be most serious in the Hereford breed, could be controlled to some degree by rigorous culling. Further study of the relationship between the incidence of prolapse and nutritional deficiencies undoubtedly would result in a more complete solution of the problem.

Footnotes

1 A contribution of Western Regional Project W-1 on Beef Cattle Breeding Research.

2 The authors wish to express their appreciation to J. J. Urick of the North Montana Branch Station for supplying the data from the Havre herd.






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Copyright © 1956 by the American Society of Animal Science.