Methods Retrospective analysis of 337 cases associated with persistent posterior occiput presentation during 1991~1999.
方法对1991～ 1999年在本院持续性枕后位分娩的337例初产妇进行回顾性分析。
Methods Retrospective analysis of 337 cases associated with persistent posterior occiput presentation during 1991~1999.
方法对1991～ 1999年在本院持续性枕后位分娩的337例初产妇进行回顾性分析。
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