Effect of human chorionic gonadotropin on the testicular delta 5-3 beta-hydroxysteriod dehydrogenase and spermatogenesis in hibernating toad (Bufo melanostictus).

A histochemical study of testicular delta 5-3 beta-hydroxysteroid dehydrogenase (delta 5-3 beta-OHD) and a quantitative study of seminiferous tubules in hibernating toad following the administration of HCG revealed stimulation in the activity of the enzyme delta 5-3 beta-OHD and the spermatogenesis by increasing spermiation, meiotic division and the maturation of secondary spermatogonia.