我院自1978-01～1998-12间住院足月分娩发生肩难产,胎儿虽存活,但全部并发臂丛神经损伤,现报告分析如下。1　临床资料及方法5例均自然临产,骨盆外测量各径线均正常。其中:初产妇2例,经产妇3例,年龄为23～35岁,孕龄为39～42周,平均身高1678ｃｍ,平均体重为802ｋｇ。平均宫高为40 Our hospital from January 1978 to December 1998 births occurred in full term shoulder dystocia, although the fetus survived, but all the brachial plexus injury, the report is analyzed as follows. 1 Clinical data and methods 5 cases of natural childbirth, all measurements were normal pelvic diameter. Among them: 2 cases of primipara, 3 cases of maternal, aged from 23 to 35 years old, gestational age of 39 to 42 weeks, the average height of 1678cm, the average weight of 802kg. The average palace height is 40