to observe the changes in endogenous oxytocics during spontaneous and induced labor , the plasma concentrations of oxytocin , prostaglandin e1 ( pge1 ) and 13,14-dihydro-15-keto-prostaglandin f2 alpha ( pgfm ) were measured during labor in 9 cases of spontaneous labor ( group 1 ) , 10 of pge2-induced labor ( group 2 ) , and 7 of pgf2 alpha-induced labor ( group 3 ) .
C0022864
labor
C0474461
spontaneous labor