using radioimmunoassay method , we have estimated the levels of cortisol ( c ) , pregnenolone ( delta 5p ) , 17-hydroxypregnenolone ( 17-oh-delta 5p ) , dehydroepiandrosterone ( dhea ) , 17-hydroxyprogesterone ( 17-oh-p ) , androstenedione ( a ) , testosterone ( t ) and dihydrotestosterone ( dht ) in peripheral plasma samples collected at short-time ( 15 min ) intervals from 10 fertile men , during two 4-h periods ( 06.00 to 10.00 and 18.00 to 22.00 ) .
C0373704
pregnenolone
C0376260
17-hydroxypregnenolone