患者，26岁，农民。因停经9个月．阵发性腹痛：1小时，于1997年2月17日8时入院，诊断：孕1产0孕38周双胎临产。入院查4测正常，心肺正常。宫高41cm，腹围94cm．先露为两个头，一个胎头已入盆，一个胎头在脐耻之间，胎心音分别为150次／min，规则，140次／min，规则。外阴发育正 Patient, 26 years old, farmer. Due to menopause 9 months. Paroxysmal abdominal pain: 1 hour, at 8:00 on February 17, 1997 was admitted to the hospital, diagnosed: pregnancy 1 0 pregnant 38 weeks of twin births. Admission check 4 test normal, normal heart and lung. Palace height 41cm, abdominal circumference 94cm. First exposed as two heads, a fetal head has been into the basin, a fetal head between the umbilical shame, fetal heart sounds were 150 times / min, the rules, 140 beats / min, rules. Genital development is positive