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[会议论文] 作者:Min,Guo Baoyan,Li Yingxia,Guan Fujuan,Wu Junqin,Liu Xirong,Huang Lihua,Xiao Zhenping,Guo Xiaolan,Ma Fenglan,
来源:2014中国妇产科学术会议 年份:2014
Background WHO practice guideline recommended up-right position delivery.Previous study state that on your-hands hands-and and-knees position and squatting position has lead to the widest parameter of...
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