maternal and fetal sheep organs were measured for their concentrations of prostaglandins ( pg ) e2 , f2 alpha , 13,14-dihydro-15-keto pgf2 alpha ( pgfm ) , 6-keto pgf1 alpha ( hydrolysis produce of pgi2 ) , and 6-keto pge1 ( enzymatic product of pgi2 ) by radioimmunoassay at day 131 of pregnancy ( 0.90 gestation ) .
C0012472
prostaglandins
C0032961
gestation