All of them in the two groups were specially attended by midwives. delivery course time, the amount of postpartum hemor- rhage, Apgar score of newborn, injury of soft birth canal, perineotomy and cesarean section were recorded in de- tail.

• 两组孕妇均由专人看管产程,详细记录产程时间、产后出血量、新生儿Apgar评分、软产道损伤情况、剖宫产及会阴侧切情况。