1. Department of Fetal Medicine and Prenatal DiagnosisThe Third Affiliated Hospital of Guangzhou Medical University Guangzhou China
2. Obstetrics and Gynecology Institute of Guangzhou Guangzhou China
3. The Medical Centre for Critical Pregnant Women in Guangzhou Guangzhou China
4. Key Laboratory for Major Obstetric Diseases of Guangdong Province Guangzhou China
5. Tianjin Medical LaboratoryBGI‐Tianjin, BGI‐Shenzhen Tianjin China
6. BGI GenomicsBGI‐Shenzhen Shenzhen China
7. Wuhan BGI Clinical Laboratory Co., LtdBGI‐Wuhan, BGI‐Shenzhen Wuhan China
8. Beijing Obstetrics and Gynecology HospitalCapital Medical University Beijing China
9. Key Laboratory for Reproduction and Genetics of Guangdong Higher Education Institutes Guangzhou China