米索前列醇是近两年来用于晚期妊娠引产的一种有效药物[1]。与其它引产药物如催产素、蓖麻油相比，具有价格便宜、使用方便、孕妇痛苦少、减轻医护人员工作量等优点，但如果使用不当也会发生严重并发症，所以药物剂量的大小、用药途径及用后母婴的安全性仍在探索之中。为探讨米 Misoprostol is an effective drug for induction of labor during late pregnancy in the past two years [1]. Compared with other induction drugs such as oxytocin and castor oil, it has the advantages of cheap price, easy to use, less pain for pregnant women and less work load for medical staff. However, serious complications may occur if used improperly. Therefore, the dosage of the drug and medication Ways and maternal and child safety is still under exploration. To explore rice