中期妊娠的终止,为一比较复杂的问题。孕中期胎盘已形成,胎儿体积增大,骨胳硬化,内分泌功能旺盛,子宫处于不活动状态,为低羊水压力。终止妊娠的方法原则上必须无感染,出血少及流产完全。中期妊娠引产,近年来以高渗氯化钠及葡萄糖液注入羊膜腔内作等量交换颇引人注意。羊水交换法,早于1938年Aburel首先试 The termination of midterm pregnancy is a more complicated issue. Second trimester placenta has been formed, the fetus increases in size, bone sclerosis, endocrine function, the uterus is inactive, low amniotic fluid pressure. In principle, the method of termination of pregnancy must be free of infection, less bleeding and abortion completely. Mid-term pregnancy induced labor, in recent years with hypertonic sodium chloride and glucose into the amniotic cavity for considerable exchange quite interesting. Amniotic fluid exchange method, as early as 1938 Aburel first try