无保护会阴分娩产妇会阴裂伤的危险因素分析

王玲王晓薇王战云

The risk factors of maternal perineal laceration among lying-in women using unprotected perineal delivery technique

中国护理管理 . 2017, (12): 1616 -1619 . DOI: 10.3969/j.issn.1672-1756.2017.12.009