concentrations of estradiol ( e2 ) , progesterone ( p ) , 17-hydroxyprogesterone ( 17-ohp ) , hcg and hpl were measured by radioimmunoassay in sera obtained serially from 35 subjects who received artificial termination of pregnancy and 24 of them were administered 10,000 iu of hcg 3 to 5 days later when endogenous hcg had sufficiently decreased .
C0033308
progesterone
C0020387
17-hydroxyprogesterone