Affiliation: | 1. UCL Centre for Preimplantation Genetic Diagnosis, Department of Obstetrics and Gynaecology, 86–96 Chenies Mews, University College London, London, WC1E 6HX, UK;2. Yale University School of Medicine, Department of Obstetrics and Gynecology, New Haven, Connecticut, USA;3. UCL Assisted Conception Unit, University College London, London, UK |