前置胎盘的发生率变化与人工流产史产妇比例变化的关系研究

目的探讨前置胎盘发生率的变化，分析其与人流之间的关系并寻找预防前置胎盘相应的对策。方法以回顾性分析方法对20年来我院的496例前置胎盘病例及既往人流产妇病例进行对比分析。结果前置胎盘发生率为1．01％，前置胎盘的发生率近十五年来显著上升，中央型前置胎盘构成比显著升高（尸〈0．01），前置胎盘患者人流史比例高。既往人流产妇发生率为33．6％，既往人流产妇比例近十五年来显著上升（户〈0．05）。结论既往人流产妇比例增多可能是前置胎盘发生率上升的原因

Relationship between the incidence change in placenta previa and the proportion change of puerpera with abortion history

Objective To explore the change of the placenta previa incidence, and analyze the relationship between abortion rate and it, looking for corresponding prevention countermeasures for placenta previa. Methods With retrospective analysis method, 496 cases of placenta previa in 20 years were analyzed comparing with those cases with past abortion puerpera history. Results The placenta previa incidence is 1.01％, and it increased significantly over the past 15 years. The constituent ratios of central type placenta previa significantly increased too. The abortion history has a high proportion in the placenta previa patients. The past puerpera abortion incidence was 33.6％, which rose dramatically over the past 15 years. Conclusion The past puerpera abortion incidence' s increasing may be the reason why incidence of the placenta previa rises.