1. Nanjing Maternal and Child Health InstituteNanjing Maternal and Child Health HospitalObstetrics and Gynecology Hospital Affiliated to Nanjing Medical UniversityNanjingP.R. China
2. Department of Gynecology, Nanjing Maternal and Child Health HospitalObstetrics and Gynecology Hospital Affiliated to Nanjing Medical UniversityNanjingP.R. China
3. Department of Clinical Laboratory, Nanjing Maternal and Child Health HospitalObstetrics and Gynecology Hospital Affiliated to Nanjing Medical UniversityNanjingP.R. China
4. Department of Reproduction, Nanjing Maternal and Child Health HospitalObstetrics and Gynecology Hospital Affiliated to Nanjing Medical UniversityNanjingP.R. China
5. Center of Clinical Reproductive MedicineThe First Affiliated Hospital of Nanjing Medical UniversityNanjingP.R. China