1. Department of Gynecological Endocrinology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
2. Beijing Maternal and Child Health Care Hospital, Beijing, China
3. Department of Gynecology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
4. Department of Gynecological Oncology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
5. Department of Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
6. Department of Obstetrics, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
7. Department of Ultrasound, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
8. Department of Obstetrics and Gynecology, Johanna Etienne Hospital of Neuss, Neuss, Germany
9. Ilabcomm GmbH, Augustin, Germany
10. UniCareD, University Cryobank for Assisted Reproductive Medicine and Fertility Protection at UniKiD, University Women’s Hospital Düsseldorf, Düsseldorf, Germany
11. University Women’s Hospital and Research Centre for Women’s Health, Department of Women’s Health, University of Tuebingen, Tuebingen, Germany