serum activities and concentrations , respectively , of early pregnancy factor ( epf ) , early pregnancy associated protein ( epap ) , beta-hcg , estradiol , progesterone and 17-hydroxyprogesterone were estimated in 20 healthy primigravidae within the tenth to twelfth completed gestational week before and after therapeutic abortion .
C0033308
progesterone
C0020387
17-hydroxyprogesterone