as an extension of our studies on the influence of age on testicular function and with the aim of detecting whether the decline in testosterone production by aged testes is accompanied by a block in the biosynthetic chain leading from cholesterol to testosterone , we determined in the testis of young and elderly men , who died suddenly either from a cardiac incident or from accident , intratesticular steroids : pregnenolone , 17 hydroxypregnenolone ( 3 beta , 17 alpha-dihydroxy-5-pregnen-20-one ) , dehydroepiandrosterone , androstenediol , ( 5-androsten-3 beta , 17 beta-diol ) , progesterone , 17 hydroxyprogesterone , androstenedione , 17 beta-estradiol as well as testosterone , dihydrotestosterone ( 5 alpha-androstan-17 beta-ol-3-one ) and androstanediol ( 5 alpha androstane-3 alpha , 17 beta-diol ) .
C0033308
progesterone
C0020387
17 hydroxyprogesterone