sulfokinase , sulfatase , 17 beta-hsd , 20 alpha-hsd , 3 beta-hsd and 5 alpha-reductase activity and steroid concentrations including estradiol , estrone , estrone-sulfate , progesterone , 20 alpha-dihydroprogesterone , dha and dha-sulfate in endometrial tissue were examined in order to study the changes in steroid metabolism in relation to the menstrual cycle in the human endometrium .
C0033308
progesterone
C0012311
20 alpha-dihydroprogesterone