Results The blood losing was increased with pregnancy weeks and incidence of postpartum of 9% that including placenta remain and soft birth canal injury.
结果失血情况随孕周增加、失血量增多。产后病率9% ，包括胎盘残留及软产道损伤等。
Result Uterine inertia in 12 cases (63.1%), placental factor 5 cases (26.3%), soft birth canal injury factors, 1 case (5.3%), coagulation dysfunction in 1 case (5.3%).
结果宫缩乏力12例（63.1%），胎盘因素5例（26.3%），软产道损伤因素1例（5.3%），凝血功能障碍1例（5.3%）。
The observation group fetal childbirth time is short, the soft the birth canal, postpartum blood loss was less damage number fewer days in hospital and short.
观察组胎儿娩出时间短、软产道损伤例数少、产后出血量少及住院天数短。
The observation group fetal childbirth time is short, the soft the birth canal, postpartum blood loss was less damage number fewer days in hospital and short.
观察组胎儿娩出时间短、软产道损伤例数少、产后出血量少及住院天数短。
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