steroids were measured either directly ( testosterone and progesterone ) or after previous oxidation and thin layer chromatographic purification of the steroid extracts ( 4-androstene-3,17-dione , 5 alpha-androstane-3,17-dione , progesterone , 5 alpha-pregnane-3,20-dione ) .
C0038317
steroid
C0033006
pregnane