1. BGI-Shenzhen; Shenzhen China
2. Department of Perinatology, Beijing Obstetrics and Gynecology Hospital; Capital University of Medical Sciences; Beijing China
3. The Center of Prenatal Diagnosis, Shenzhen People's Hospital; 2nd Clinical Medical College of Jinan University; Shenzhen China
4. Department of Obstetrics and Gynecology; Chinese PLA General Hospital; Beijing China
5. Southwest Hospital; The Third Military Medical University; Chongqing China
6. Center of Prenatal Diagnosis; Nanjing Maternal and Child Health Hospital, Nanjing Medical University; Nanjing China
7. Fetal Medicine Centre; Paramount Clinic; Hong Kong
8. Zhuhai Institute of Medical Genetics; Zhuhai Municipal Maternal and Child Healthcare Hospital; Zhuhai China
9. Department of Obstetrics; The Second People's Hospital of Shenzhen, The First Affiliated Hospital of Shenzhen University; Shenzhen China
10. Key Laboratory of Reproductive Genetics; Zhejiang University, Ministry of Education; Hangzhou China
11. Department of Reproductive Endocrinology; Women's Hospital, Zhejiang University School of Medicine; Hangzhou China
12. Central for Prenatal Diagnosis; Shenzhen Maternity and Child Healthcare Hospital, Affiliated Southern Medical University; Shenzhen China
13. Department of Obstetrics; Shanghai 1st Maternity and Infant Hospital, Tongji University; Shanghai China
14. Department of Obstetrics and Gynecology; Peking University People's Hospital; Beijing China
15. Department of Clinical Laboratory; Hubei Maternal and Child Health Hospital; Wuhan China
16. Medical Genetic Center; Henan Provincial People's Hospital, Zhengzhou University People's Hospital; Zhengzhou China
17. Prenatal Diagnosis Center; Maternal and Child Health Hospital of Shanxi Province; Xi'an China
18. Department of Obstetrics and Gynecology; Wuhan Medical Care Center for Women and Children; Wuhan China
19. Department of Perinatal Medicine; Peking University Third Hospital; Beijing China
20. Xiamen Prenatal Diagnosis Center; Xiamen Maternal and Child Health Care Hospital; Xiamen China
21. Prenatal Diagnosis Center, Department of Obstetrics and Gynecology; Nanjing Drum Tower Hospital, Nanjing University Medical School; Nanjing China
22. Department of Gynecology and Obstetrics; Nanfang Hospital, First Military Medical University; Guangzhou China
23. Department of Perinatal Medicine; Dalian Obstetrics and Gynecology Hospital; Dalian China