National University of Singapore (NUS) - Department of Obstetrics and Gynaecology, National University of Singapore (NUS) - Department of Obstetrics and Gynaecology, National University of Singapore (NUS) - Department of Obstetrics and Gynaecology, National University of Singapore (NUS) - Department of Pediatrics, National University of Singapore (NUS) - Department of Pediatrics, National University of Singapore (NUS), Agency for Science, Technology and Research (A*STAR) - Singapore Institute for Clinical Sciences (SICS), Duke-NUS Graduate Medical School Singapore, KK Women’s and Children’s Hospital, KK Women’s and Children’s Hospital - Department of Paediatrics, KK Women’s and Children’s Hospital, Agency for Science, Technology and Research (A*STAR) - Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR) - Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR) - Singapore Institute for Clinical Sciences (SICS), University of Southampton - MRC Lifecourse Epidemiology Unit, Agency for Science, Technology and Research (A*STAR) - Singapore Institute for Clinical Sciences (SICS) and National University of Singapore (NUS) - Department of Obstetrics and Gynaecology