Sally Collins is a Consultant Obstetrician subspecialising in Fetal Medicine and abnormally adherent and invasive placenta, and an Associate Professor at St Anne's College Oxford. She graduated in Clinical Medicine from the University of Oxford, and obtained her Doctorate in Obstetric Ultrasound. She leads the FMU Placenta Clinic for the Thames Valley region, and has co-authored both national and international guidelines for the classification, diagnosis, and management of abnormally invasive placenta (or placenta accrete spectrum). She is Vice Chair of the International Society for PAS (I-PAS) and an elected representative to the European Placenta Group Committee, and Series Editor for the Oxford Specialist Handbooks in Obstetrics and Gynaecology. Sir Sabaratnam Arulkumaran is a Professor of Obstetrics and Gynaecology at the University of Nicosia Medical School, Professor Emeritus at St George's, University of London, and Visiting Professor at Imperial College, London. Professor Arulkumaran graduated with an honours MBBS degree and a Diploma in Child Health from the University of Ceylon. He then obtained his MD and PhD by research from the National University of Singapore. He is former president of the International Federation of Gynaecology and Obstetrics (2012-2015), the Royal College of Obstetricians and Gynaecologists (2007-2010) and president-elect of the British Medical Association (2012-2014). Sir Sabaratnam's research and clinical interests are in understanding and improving the quality of life for women and new-born babies. Kevin Hayes trained in Leicester and then did postgraduate training in Obstetrics and Gynaecology in the North London Deanery. He has been the lead for the acute gynaecology and early pregnancy for 10 years and talks regularly on related subjects nationally as an invited speaker. He also receives tertiary referrals for women with genetic susceptibility to ovarian cancer and women with arterio-venous malformations of the pelvis. He has a major academic interest in the assessment of medical education and is the Head of Assessment for the Medical School and represents St George's University locally, nationally, and internationally. Kirana Arambage is a Consultant Gynaecologist specialising in advanced gynaecological endoscopy and endometriosis at the Endometriosis Care and Research Centre, John Radcliffe Hospital Oxford, and an Honorary Senior Clinical Lecturer at the University of Oxford. He is the preceptor for advanced laparoscopic and hysteroscopic surgery in Oxford Deanery. He led the gynaecological endoscopic surgical simulation training of the School of Obstetrics and Gynaecology in Oxford Deanery for 5 years. He graduated in clinical medicine and surgery from the University of Sri Jayewardenepura, Sri Lanka. He then obtained his MSc with merit pass in advanced gynaecological endoscopy from the University of Surrey and was awarded MRCOG in 2009. He has co-authored Cochrane reviews, national and international guidelines in gynaecology related topics. He is Honorary Secretary of the British Society for gynaecological Endoscopy, UK. Lawrence Impey qualified in 1988 and was awarded the Fellowship of the Royal College of Obstetricians and Gynaecologists (FRCOG) in 2007. He was educated at Oxford University and University College in London and he has been a Consultant in Obstetrics and Fetal Medicine in Oxford since 2001. He was featured in Tatler's Best Doctors Guide in 2013. He is the author of the leading medical student textbook in Obstetrics and Gynaecology, now co-authored with Tim Child in its fifth edition (2017). He is also co-senior editor of the Oxford Handbook of Obstetrics and Gynaecology. Mr Impey is director of sub-specialty training in maternal and fetal medicine and clinical lead for high risk services in Oxford. He is the clinical lead for the Oxford AHSN Maternity Network.