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. 2023 Apr 11;11:1066178. doi: 10.3389/fped.2023.1066178

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© 2023 Deng, Liu, Liu, Liu, Bai, Jing, Xia, Liu, Cheng, Wei, Xing, Luo, Zhou, Zhu and Liu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Distribution of maternal and fetal characteristics of the 153,306 singleton pregnant women in the study. (A) Gestational age. (B) Maternal age. (C) Maternal BMI in six groups. (D) Maternal BMI in four groups.