1. Department of Obstetrics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China;
2. The Joint International Research Laboratory of Reproduction & Development, Ministry of Education, Chongqing Medical University, Chongqing, China;
3. State Key Laboratory of Maternal and Fetal Medicine of Chongqing Municipality, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China;
4. Department of Obstetrics and Gynecology, The First People’s Hospital of Yuhang District, Hangzhou, China;
5. Department of Obstetrics, Chongqing Women and Children's Health Center, Chongqing, China;
6. Cancer, Disease and Developmental Epigenetics, Murdoch Children’s Research Institute, and Department of Paediatrics, University of Melbourne, Parkville, Australia;
7. College of Life Sciences, University of Leicester, Leicester, UK