Abstract

Epididymal sperm resorption in bulls during 10 weeks after unilateral vasectomy was evaluated. The testis on the vasectomized side was smaller (p < and had severe destruction of the germinal epithelium. The concentration and total number of testicular spermatids on the vasectomy side were only 48% (p < and 34% (p-< (p < of control. Sperm numbers in the caput-corpus and in the cauda epididymus on the vasectomized side averaged 20% (p-%c .01) of those on the control side. Total epididymal sperm on the vasectomized side was 35% of the control and alteration of spermatogenesis in bulls by vasectomy is suggested.

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