to determine the basis for the decline in testosterone production by the aged testis , intratesticular unconjugated steroids , including testosterone , pregnenolone ( 3 beta-hydroxy-5-pregnen-20-one ) , 17 alpha-hydroxypregnenolone ( 3 beta,17 alpha-dihydroxy-5-pregnen-20-one ) , dehydroepiandrosterone ( 3 beta-hydroxy-5-androsten-17-one ) , androstenediol ( 5-androstene-3 beta,17 beta-diol ) , progesterone , 17 alpha-hydroxyprogesterone , androstenedione ( 4-androstene-3,17-dione ) , and 17 beta-estradiol , were measured by simultaneous rias in 32 previously untreated elderly men ( aged 61-85 yr ) undergoing orchiectomy as therapy for prostatic carcinoma and 20 young men ( aged 25-35 yr ) with oligospermia and varicocele .
C0373704
pregnenolone
C0376260
17 alpha-hydroxypregnenolone