1. Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong; Fertility Preservation Research Centre, Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
2. Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
3. Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
4. Department of Obstetrics and Gynaecology, Union Hospital, Hong Kong
5. Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong
6. Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong; Fertility Preservation Research Centre, Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong; Li Ka Shing Institute of Health Science, School of Biomedical Sciences; and Chinese University of Hong Kong–Sichuan University Joint Laboratory in Reproductive Medicine, The Chinese University of Hong Kong, Hong Kong