Affiliation: | 1. Department of Reproduction, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China;2. Reproductive Medicine Center, Xingtai Infertility Specialist Hospital, Xingtai, Hebei, China;3. Department of Reproduction, Shijiazhuang Obstetrics and Gynecology Hospital, Shijiazhuang, Hebei, China |