| Affiliation: | 1. Department of Obstetrics and Gynecology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China;2. Fetal Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China;3. NHC Key Laboratory of Male Reproduction and Genetic, Guangdong Provincial Reproductive Science Institute, Guangzhou, China;4. Division of Maternal-Fetal Medicine, Jinan University-affiliated Shenzhen Baoan Women's and Children's Hospital, Shenzhen, China;5. Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, China;6. Department of Ultrasonic Medicine, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China |
