中期引产是计划生育的技术措施之一。对于避孕失败并且耽误了早期人工流产机会的孕妇,中期引产可做为一项有效的补救办法。近年来国内外试用过各种中期引产方法,都有一定成效。本校一院计划生育病房曾采用过水囊加催产素、天花粉(肌注或羊膜腔内注入)、高渗盐水羊水交换,酒精、芜花或雷夫奴尔羊膜腔内注入,大月份钳刮,阴式子宫峡部切开或腹式剖官取胎等。本文就其中五种方法 Mid-term labor induction is one of the technical measures of family planning. Mid-term induction of labor can be an effective remedy for pregnant women who fail contraception and delay early induced abortions. In recent years at home and abroad tried a variety of mid-term induction of labor methods, have some success. The hospital’s family planning ward had used a water bag plus oxytocin, TCS (intramuscular or amniotic cavity injection), hypertonic saline amniotic fluid exchange, alcohol, Wuhu or Rehovol amniotic cavity injection, the month clamp , Vaginal isthmus incision or abdominal cetacean fetus and so on. This article is one of five methods