目前，产后出血在我国仍然是产科四大死因之一［’j，控制和预防产后出血可有效降低产妇病死率。引起产后出血的诸因素中，各种原因造成的宫缩乏力性产后出血是产后出血的主要原因［‘］。本组近5年借鉴剖宫产术中宫体直接注射缩宫素D］预防产后出血的方法，对经阴道分娩的产妇 At present, postpartum hemorrhage is still one of the four causes of obstetrics in our country [’j, control and prevention of postpartum hemorrhage can effectively reduce maternal mortality. Cause of postpartum hemorrhage among the factors, various causes of uterine inertia postpartum hemorrhage is the main cause of postpartum hemorrhage [’]. The past 5 years in this group draw cesarean section in the Palace of direct injection of oxytocin D] to prevent postpartum hemorrhage method of vaginal delivery of mothers