1. Department of ObstetricsThe First Affiliated Hospital of Chongqing Medical University Chongqing China
2. China‐Canada‐New Zealand Joint Laboratory of Maternal and Fetal MedicineChongqing Medical University Chongqing China
3. Maternal and Child Health Hospital of Hubei Province Wuhan China
4. First Clinical InstituteChongqing Medical University Chongqing China
5. School of Public Health and ManagementChongqing Medical University Chongqing China
6. MOE‐Shanghai Key Laboratory of Children's Environmental HealthXin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai China
7. Department of NeonatologyChildren's Hospital of Chongqing Medical University Chongqing China
8. College of Life SciencesUniversity of Leicester Leicester UK