患者24岁，孕1产0，因停经40周，不规则下腹阵痛7h于1996年3月22日下午2时入院。平素月经规则，身体健康，家庭无遗传性疾病。查体：血压14／8kPa，心肺无异常，脊柱四肢无畸形，双下肢无水肿。宫底高34cm，应围101cm，胎方位LSA，胎心率140次／分．骨盆外测量在正常范围，肛查 24-year-old patient, pregnant and a 0, because of menopause 40 weeks, irregular lower abdomen pain 7h on March 22, 1996 at 2 pm admission. Regular menstruation rules, good health, family no hereditary diseases. Physical examination: blood pressure 14 / 8kPa, no abnormal heart and lung, spine limbs without deformity, no lower extremity edema. Palace heights 34cm, should be around the 101cm, fetal orientation LSA, fetal heart rate 140 beats / min. Outside the pelvis measured in the normal range, anal examination