单羊膜囊双胎极罕见,对胎儿威胁较大,死亡率较高。最近我院遇到3例,现介绍如下。 例1:23岁,孕1产1,因停经8月余,阴道流水6小时入院。孕期无不适,于33周B型超声检查证实为双胎妊娠。无家族史。体查:腹部膨隆大于足月妊娠。有不规则宫缩,胎儿均为头先露、枕前 Single sheep capsule twin extremely rare, a greater threat to the fetus, higher mortality. Recently encountered in our hospital in 3 cases, are described below. Example 1: 23 years old, pregnant 1 produce 1, due to menopause more than 8 months, vaginal water 6 hours admission. No discomfort during pregnancy, at 33 weeks B-mode ultrasound confirmed twin pregnancy. No family history. Physical examination: bulging abdomen than full-term pregnancy. There are irregular contractions, the fetus are first forehead, pillow