addition of clomiphene citrate ( 10 ( -4 ) to 2 x 10 ( -3 ) m ) to incubations of [ 7-3h , 21-14c ] progesterone with human testicular biopsy specimens in vitro caused a slight inhibition in the formation of 17 alpha-hydroxyprogesterone and a slightly increased formation of 20 alpha-hydroxy-4-pregnen-3-one but no measurable changes in the c19 steroid formation .
C0033308
progesterone
C0012311
20 alpha-hydroxy-4-pregnen-3-one