Bull Testicular and Epididymal Functions after Long-Term Vasectomy

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Abstract
Six bulls were slaughtered, 5 months (one animal) and 5-years (five animals) after vasectomy and compared with five control bulls. The results showed that vasectomy did not abolish spermatogenesis. Testis size was unaffected. Extra-gonadal sperm reserves in the corpus and cauda epididymides of the vasectomized group were significantly higher than that in the control group. Spermatozoa obtained from the cauda epididymis showed an average progressive motility of 40% in both groups. In two of six vasectomized animals spermatozoa in the corpora epididymides were motile. The incidence of secondary sperm abnormalities was higher in the vasectomized group at all levels of the epididymis. A higher proportion of spermatozoa obtained from the caput epididymides of vasectomized animals had lost their protoplasmic droplets. Copyright © 1970. American Society of Animal Science. Copyright 1970 by American Society of Animal Science

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