Method A total of 562 cases of primiparae cesarean section was selected sample in 25 years from 1970 to 1995,and was analyzed for changing in cesarean section rates and indications.

• 方法抽样选择1970-1995年25年初产妇剖宫产病例562例，比较及分析其剖宫产率及适应证的变化。