Gary Mires MBChB MD FRCOG FHEA, Professor of Obstetrics and Undergraduate Teaching Dean, School of Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK Khalid S Khan MRCOG MSc MMed, Professor of Women's Health and Clinical Epidemiology, Institute of Health Sciences Education, Bart's and the London School of Medicine and Dentistry, London, UK Janesh K. Gupta MSc MD FRCOG Professor of Obstetrics and Gynaecology, University of Birmingham, Birmingham Women's Hospital, Birmingham, UK.