RECOVERY OF GONADAL FUNCTION IN MALE RATS TREATED NEONATALLY WITH 17β-OESTRADIOL BENZOATE

Abstract
Groups of 5 day old rats were injected with 120 or 240 [mu]g of estradiol benzoate. When examined at the age of 50 days, the animal presented atrophied testes and marked decreases in the weights of ventral prostate, seminal vesicles and levator ani muscle. Treatment with pregnant mare''s serum or with testosterone propionate given from day 20 through day 50 fully restored the gonadal activity. The dose of PMS needed to restore spermatogenesis was 10 IU which was given every third day. Testosterone propionate, 1 mg, given daily was equally effective.