Ultrasound parameters in early second stage of labor: Prediction of cesarean delivery in primiparas with varied pre-pregnancy weight
LIU Yingping, JIA Yin, PEI Yan, CHEN Yi, JIANG Haili.
Chinese Journal of Clinical Obstetrics and Gynecology . 2026, (4): 339 -343 .  DOI: 10.13390/j.issn.1672-1861.2026.04.012

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