progesterone , 5 alpha-pregnane-3,20-dione ( 5 alpha-dhp ) , 3 alpha-hydroxy-5 alpha-pregnan-20-one ( 3 alpha-oh ) , 20 alpha-hydroxy-4-pregnen-3-one ( 20 alpha-dhp ) , 20 alpha-hydroxy-5 alpha-pregnan-3-one ( 20 alpha , 5 alpha ) , and 5 alpha-pregnane-3 alpha , 20 alpha-diol ( diol ) in ovarian venous plasma at first ovulation in female rats treated on day 30 with 10 iu of pregnant mare 's serum gonadotropin ( pmsg ) were assayed using gas chromatography .
C0033308
progesterone
C0012311
20 alpha-hydroxy-4-pregnen-3-one