although the testis tissue used in the present study may not be biologically normal and the number of cases investigated is still limited , the above results indicate that active 17 beta-hydroxysteroid oxidoreductase is present in immature human testes and that delta 5-3 beta-hydroxysteroid dehydrogenase may become active in the human testis at the advanced stage of the development of testicular function during the puberty .
C1515300
testis tissue
C0039597
testis