Sexual behavior in rhesus monkeys after vasectomy.

Vasectomy had no statistically significant effect on the sexual behavior of vigorous adult rhesus monkeys. Of two groups of males matched for level of sexual performance, one was vasectomized and the other underwent sham vasectomy. In sex tests administered within the month after surgery, the groups showed no difference (P .05) in rate of mounting, intromission, or ejaculation, or in any other measure of sexual or sex-related behaviors.