患者，女，18岁。因停经4．5月未婚先孕要求终止妊娠，于1995年8月22日入院。曾于孕50天药流1次。妇查：外阴未产式，阴道通畅，宫颈光滑，子宫脐下一横指余，可触及胎块，胎位不清。入院后当天下午行羊膜腔内注人利凡诺100mg，注药后第2天略不规则宫缩，予5％葡萄糖500mL加催? Patient, female, 18 years old. Due to menopause 4.5 months unmarried pregnancies require termination of pregnancy, in August 22, 1995 admission. Once in pregnancy 50 days medical abortion. Fucha: genital unproductive, vaginal patency, smooth cervix, under the umbilical of a horizontal finger, can touch the block, the fetal position is unclear. On the afternoon of the day after admission, the amniotic cavity was injected with 100 mg of rivanol, slightly irregular contractions on the second day after injection, and 500 mL of 5% dextrose plus potassium chloride was added.