Restorative effect of various androgens on copulatory behavior of the male golden hamster

Adult male hamsters were castrated, and four weeks later, after a single mating test, began receiving daily 100 μg injections of testosterone (T), androstenedione (AD), or testosterone propionate (TP). Mating tests were conducted at regular intervals during the eight week treatment period. Results indicated the superiority of TP in reinstating intromissions and ejaculations. The T and AD groups did not differ on any of the measures, a result which agrees with previous similar experiments using rats.