in order to determine the effect of treatment with hmg on hormone secretion in human pregnancy , progesterone ( prog ) , 17 beta-estradiol ( e2 ) , estriol ( e3 ) and human chorionic gonadotropin ( hcg ) were determined by radioimmunoassay in 341 serum specimens from 229 normal singleton pregnancies and in 79 serum specimens from 20 pregnancies following induction of ovulation with hmg in women with either hypothalamic amenorrhea ( ha ) or the polycystic ovary syndrome ( pco ) .
C0033308
progesterone
C0032961
pregnancies