Prince of Wales Hospital - The Chinese University of Hong Kong, Hanoi Obstetrics and Gynecology Hospital, Prince of Wales Hospital - The Chinese University of Hong Kong, Hanoi Obstetrics and Gynecology Hospital, CRIFM Prenatal Medical Clinic, Toyama University Hospital, Nanjing University, Nanjing University - Drum Tower Hospital, Department of Obstetrics and GynecologyNanjing University - Center for Reproductive Medicine, Kunming Medical University - Department of Obstetrics and Gynecology, Harapan Kita Women and Children Hospital, affiliation not provided to SSRN, National University of Singapore (NUS) - National University Hospital, Showa Medical University - Showa University Hospital, Chiang Mai University, Taiji Clinic, Chulalongkorn University - King Chulalongkorn Memorial Hospital, Thammasat University, Guangzhou Medical University - Guangzhou Key Laboratory of Maternal-Fetal Medicine, Chang Gung University - Chang Gung Memorial Hospital, Government of the Hong Kong Special Administrative Region - Kwong Wah Hospital, Universiti Kebangsaan Malaysia, University of the Philippines, Manila - Philippine General Hospital, Prince of Wales Hospital - The Chinese University of Hong Kong, Prince of Wales Hospital - The Chinese University of Hong Kong, Prince of Wales Hospital - The Chinese University of Hong Kong, Prince of Wales Hospital, Prince of Wales Hospital - The Chinese University of Hong Kong, Prince of Wales Hospital - The Chinese University of Hong Kong, The Chinese University of Hong Kong (CUHK) - School of Public Health and Primary Care and Prince of Wales Hospital