1. Department of Assisted Reproduction, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai, China
2. School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University , Shanghai, China
3. Department of Obstetrics and Gynaecology, The School of Clinical Sciences at Monash Health, Monash University , Clayton, VIC, Australia
4. Department of Obstetrics and Gynaecology, Aberdeen Centre for Women’s Health Research, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen , Aberdeen, UK
5. Department of Obstetrics and Gynaecology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai, China
6. National Perinatal Epidemiology and Statistics Unit (NPESU), Centre for Big Data Research in Health, and School of Clinical Medicine, Faculty of Medicine, University of New South Wales , Sydney, NSW, Australia