1. Prenatal Diagnosis Center The Third Affiliated Hospital of Zhengzhou University Zhengzhou China
2. Molecular Genetics Laboratory The Third Affiliated Hospital of Zhengzhou University Zhengzhou China
3. Department of Imaging The Third Affiliated Hospital of Zhengzhou University Zhengzhou China
4. Department of Obstetrics and Gynecology The Third Affiliated Hospital of Zhengzhou University Zhengzhou China