The associations of gestational weight gain and midpregnancy lipid levels with placental size and placental-to-birth weight ratio: findings from a chinese birth cohort study by Kangdi Zhang, Xiaomin Jia, Wenjie Yu, Xin Cheng, Yingqing Li, Xinqiang Wang, Jie Wang, Zhenhua Li, Yicheng Mao, Jiawen Zhao, Tao Li, Maolin Chen, Guopeng Gao, Chengyang Hu, Shuangqin Yan, Xiujun Zhang

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