中国当代医药
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中国当代医药  2020, Vol. 27 Issue (22): 127-130    DOI:
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Application of delivery ball + free position midwifery in primiparas and its influence on delivery mode
GUI Yue-e YANG Hong-zhi
Department of Obstetrics and Gynecology, Yingtan Maternal and Child Health Hospital, Jiangxi Province, Yingtan 335000, China
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