患女、23岁、汉族、农民、于1987年4月2日以孕6~+月,第一胎,下腹部阵发性坠痛1小时,伴有少量血性分泌物而入院。一般体检无异见。产科检查宫底脐上3cm,先露头、浮、胎心140次/分,宫缩规律,持续30″/5～6分(间歇)。外阴已婚未产型,当日上午8时自然破水,羊水约2升、儿头娩出顺利,但胎儿腹部膨大不能娩出,当即行除脏术,剪开腹壁流 Female, 23 years old, Han nationality, peasant, on April 2, 1987 to pregnancy 6 ~ + month, the first child, paroxysmal fall pain in the lower abdomen 1 hour, accompanied by a small amount of bloody discharge and hospitalization. No difference between the general medical examination. Obstetric examination at the end of the uterus at the bottom of the palace 3cm, first outcrop, floating, fetal heart rate 140 beats / min, contractions of the law for 30 "/ 5-6 minutes (intermittent) vulva married unproductive type, Amniotic fluid about 2 liters, the child delivered a smooth, but the fetus can not be inflated to the abdomen, and immediately remove the dirty operation, cut open the abdominal wall flow