1病例报告患者，34岁，因停经36周，腹部阵痛半天伴见红于1997年4月8日入院，体格检查无异常。产检：宫高28cm，腹围80cm，先露头一半固，股位LoA，股心138次／min，宫缩20”／5’～10’，窗口未开，胎膜未破，估计胎儿体重2700g，骨盆外测量无异常，B超示晚孕，单活服，胎儿双 A case report of patients, 34 years of age, menopause for 36 weeks, abdominal pain with a half-day meeting with the red on April 8, 1997 admission, physical examination was normal. Inspection: Palace height 28cm, abdominal circumference 80cm, out of the first half of the solid, the stock LoA, Coronary 138 / min, contractions 20 / 5-10, the window is not open, the membranes are not broken, it is estimated that the fetus weight 2700g , No abnormal pelvic measurement, B ultrasound shows late pregnancy, single living clothes, fetus double