目的:探讨临床中导致产妇产后出血的原因及相关的危险因素。方法:选取2013年9月~2014年9月之间于我院分娩的2143例产妇,从年龄、分娩方式、有无分娩史、妊娠胎数和分娩孕周方面统计产后出血的发生率,并分析导致产后出血的原因。结果:共65例孕妇产后出血,发生率为3.03%,原因包括凝血功能异常、软产道裂伤、胎盘因素(包括胎盘粘连、胎盘前置与胎盘早剥等)和宫缩乏力,其中最主要的就是宫缩乏力和胎盘因素,所占比例分别为50.77%和29.23%;年龄低于35岁的产妇、阴道自然分娩的产妇、经产妇、单胎妊娠产妇和孕周等于及大于40周的产妇发生产后出血的几率远小于年龄大于等于35岁、通过剖宫产分娩、无分娩史、多胎妊娠和分娩孕周低于40周的产妇,P<0.05。结论:引起产后出血的原因包括凝血功能异常、软产道裂伤、胎盘因素和宫缩乏力,其相关危险因素包括年龄超过35岁、剖宫产分娩、无分娩史、多胎妊娠和孕周低于40周,因此对于存在上述情况的产妇,应当加强孕期保健和产前宣教,积极实施干预措施,保障顺利完成分娩。 Objective: To investigate the causes of maternal postpartum hemorrhage and related risk factors in clinic. Methods: From September 2013 to September 2014, 2143 pregnant women delivered in our hospital were enrolled in this study. The incidence of postpartum hemorrhage was calculated according to age, mode of delivery, birth and absence, gestational age, gestational age and Analysis of the causes of postpartum hemorrhage. Results: A total of 65 cases of postpartum hemorrhage occurred in pregnant women with a rate of 3.03%. The causes included coagulation abnormalities, soft birth canal laceration, placental factors (including placenta accreta, placenta previa and placental abruption, etc.) and uterine atony, of which the most important Of them were uterine atony and placenta, accounting for 50.77% and 29.23% of the total respectively. Maternal age less than 35 years and spontaneous delivery of the vagina were significantly higher than those of women with maternal and singleton pregnancies and gestational weeks equal to or longer than 40 weeks Maternal postpartum hemorrhage was far less likely to be 35 years and older with cesarean delivery, no history of childbirth, multiple pregnancies, and mothers with gestational age less than 40 weeks. CONCLUSION: The causes of postpartum hemorrhage include coagulation abnormalities, soft birth canal laceration, placental factors, and uterine atony. The associated risk factors include age over 35, cesarean section delivery, no birth history, multiple pregnancy and gestational age less than 40 weeks, so for the existence of the above situation of mothers, pregnancy health care should be strengthened and prenatal education, and actively implement interventions to ensure the successful completion of childbirth.