Affiliation: | 1. Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, , Chengdu, China;2. Department of Forensic DNA laboratory, Public security bureau of Beijing' Haidian, , Beijing, China;3. Sichuan University‐The Chinese University of Hong Kong Joint Laboratory for Reproductive Medicine, West China Institute of Women and Children's Health, West China Second University Hospital, Sichuan University, , Chengdu, China |