Ningbo University, Peking University - Center for Reproductive Medicine, Ningbo University, Ningbo University, Ningbo University, Ningbo University, Peking University, Peking University - Department of Maternal and Child Health, Peking University, Peking University, Peking University, Ningbo University, Tulane University - Department of Epidemiology, Leibniz Institute for Prevention Research and Epidemiology - BIPS, Peking University - Department of Maternal and Child Health and Ningbo University