
Analysis of risk factors of perineal laceration of primipara during unprotected transvaginal delivery
YANG Amin, ZOU Xianling, ZHOU Weimin
Chinese Journal of Family Planning ›› 2022, Vol. 30 ›› Issue (7) : 1685.
Analysis of risk factors of perineal laceration of primipara during unprotected transvaginal delivery
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