there were significant correlations between acth and ir-beta-endorphin concentrations during spontaneous labor and delivery ( r = 0.921 , p less than 0.0001 ) , as well as in oxytocin or pg.f2 alpha induced/maintained labor and delivery ( r = 0.833 , r = 0.916 , p less than 0.0001 , respectively ) .
C0474461
spontaneous labor
C0022864
labor