子宫颈机能不全是导致习惯性中期流产及早产的主要原因之一。我院1987年1月～1997年10月采用子宫颈粘膜下高位环扎术治疗宫颈机能不全91例，效果满意，总结如下。1资料与方法1．1一般资料91例患者年龄24～36岁，平均28．4岁。均有中期2～5次的自然流产史。流产发生时间：妊娠13 Cervical incompetence is one of the major causes of habitual midterm abortions and premature births. Our hospital from January 1987 to October 1997 cervical submucosal high cerclage treatment of cervical incompetence in 91 cases, the results are satisfactory, summarized as follows. 1 Materials and Methods 1.1 General Information 91 patients aged 24 to 36 years, mean 28.4 years old. Have a medium 2 to 5 times the history of spontaneous abortion. Abortion time: pregnancy 13