fetal and maternal plasma cortisol , progesterone , estrone , prostaglandin e2 ( pge2 ) and 13 , 14 dihydro 15-keto prostaglandin f2 alpha ( pgfm ) were measured before and during pulsatile administration of acth1-24 ( 1 microgram infused over 15 min , every 2 h ; p-acth ) to one fetus in each of six twin pregnancies until parturition was initiated .
C0012472
prostaglandin e2
C0032961
pregnancies