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The Storage of Horse and Swine Semen^*

Missouri Agricultural Experiment Station, Montana Agricultural Experiment Station andUnited State Department of Agriculture Cooperating

Abstract

Conclusions: Thus 2 mares have been successfully impregnated with semen stored 20 hours. In one case semen was shipped 1,912 miles. Swine semen has been successfully stored 12, 24 and 56 hours respectively. Two or more inseminations per heat period in swine increased significantly the percentage of pregnancies as compared to single inseminations. It is imperative that stored stallion semen be used just before ovulation thus minimizing the insemination-fertilization interval. It is particularly important that semen that is to be stored be of high quality.

^* Contribution from the Department of Animal Husbandry, Missouri Agricultural Experiment Station, Journal Series 657.

^** The authors wish to express their appreciation to the members of the staff at the U. S. Range Livestock Experiment Station, especially to Dr. E. B. Osborn, for the cooperation they gave in these studies, and to Dr. R. G. Schott and S. R. Speelman of the U. S. D. A. for assistance in the collecting and processing of stallion (Rowdy) semen at Beltsville, Maryland.