孕妇秦某23岁,汉族,农民。第一胎。因妊娠6个月腹部异常增大,于12—4—20疑胎儿畸形入院。该患停经40天有恶心呕吐、择食等早孕反应。于停经50天与70天各有一次感冒,未用药治愈。孕5个半月时有胎动,近一个月来,腹部增长迅速,并感胸闷、气短,入院查体一般状况好,腹部如妊娠8个月大小。腹壁紧张、胎位不清,胎心遥远。B超检查可见2个胎头于右季肋下,双顶颈分别为6.0cm、6.5cm,二个脊柱、二个胎心,胸腹腔内可见大量积液,横隔下见一肝脏及漂浮在内的肠管,下腹部可见10cm×10cm大球形液性暗区,胎盘位于子宫前壁,羊水深度不超过1cm。提示联体双胎,胎儿胸腹腔积液,羊水过少。X线摄片双胎。入院第九天剖宫取胎证实B超诊断,几乎未见羊水,胎儿双颅胸腹联体,4个上肢,3个下肢,体重 23-year-old pregnant woman Qin, Han nationality, peasant. first born. Abdominal abnormalities increased 6 months of pregnancy, suspected fetal malformation at 12-4-20 admission. The affected menopause 40 days have nausea and vomiting, premature ejaculation and other reactions. In menopause 50 days and 70 days have a cold, no medication cure. Pregnancy 5 and a half months have fetal movement, the past month, the abdomen rapid growth, and feeling chest tightness, shortness of breath, admitted to the general physical examination, abdomen, such as the size of 8 months of pregnancy. Abdominal wall tension, fetal position is unclear, fetal heart distant. B ultrasound examination shows two fetal head in the right quarter ribs, double top neck were 6.0cm, 6.5cm, two spine, two fetal heart rate, pleural cavity can be seen a lot of effusion, septum see a liver and floating The intestine, the lower abdomen visible 10cm × 10cm large spherical dark area, the placenta is located in the anterior wall of the uterus, amniotic fluid depth does not exceed 1cm. Tip conjoined twins, fetal pleural effusion, oligohydramnios. X-ray twins. On the ninth day of admission, fetus was taken for cesarean section confirmed by B-ultrasound, almost no amniotic fluid, fetal double-breasted chest and abdomen, 4 upper limbs, 3 lower limbs, body weight