to elucidate the controversial point whether , in analogy with delta 5-steroid secretion , adrenal delta 4-steroid secretion is significantly decreased in elderly persons , we studied the response of plasma levels of both delta 5-steroids ( dehydroepiandrosterone , 17-hydroxypregnenolone , and pregnenolone ) and delta 4-steroids ( cortisol , androstenedione , 17-hydroxyprogesterone , and progesterone ) to acute acth stimulation in four groups of young and elderly males and females , respectively .
C0020387
17-hydroxyprogesterone
C0033308
progesterone