serum progesterone , human chorionic gonadotropin , prostaglandin e2 , f2 alpha and 13,14-dihydro-15-keto-pgf2 alpha and urinary immunoractive prostaglandins e2 and f2 alpha were measured throughout gestation in a woman who previously had experienced three abortions , an immature birth of a twin and a term single pregnancy .
C0012472
prostaglandins e2
C0032961
gestation