Methods: Retrospective analysis was made on 118 women with hematoma of birth canal and 1279 women with normal delivery in the corresponding period.

方法：选择118例产道血肿病例及同期平产的12 79例病例进行回顾性对照分析。

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Methods: Retrospective analysis was made on 118 women with hematoma of birth canal and 1279 women with normal delivery in the corresponding period.

方法：选择118例产道血肿病例及同期平产的12 79例病例进行回顾性对照分析。

youdao