Affiliation: | 1.Department of Hysteroscopic Center, Fuxing Hospital, Capital Medical University, Beijing 100038, China;2.IVF Unit, Department of Obstetrics & Gynaecology, Hammersmith Hospital, Imperial College London, UK;3.Assisted Reproduction Unit, Department of Obstetrics & Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, China. |