Testosterone and dihydrotestosterone content of the testis during guinea pig]

The fetal guinea-pig testis synthetizes testosterone and reduces it in 5 alpha-dihydrotestosterone. The embryonic period which goes from the gonadla differentiation (on day 23) up to the beginning of the sex ducts differentiation (on day 29) is characterized in male guinea-pig by a very important testicular load in testosterone and DHT.