Mr Christoph Lees is a Maternal-Fetal Medicine subspecialist, Consultant Obstetrician and Head of Fetal Medicine at Imperial College London where he is Clinical Reader. He is visiting Professor, KU Leuven, Belgium, was RCOG inaugural National Ultrasound Officer 2010-2013 and Vice Chairman, RCOG Subspecialty Committee 2011-2013. His research focuses on pre-eclampsia, cardiovascular adaptation, Doppler, intra-uterine growth restriction and non-invasive fetal surgery. Christoph’s collaborations include Chief Investigator for the TRUFFLE Study 2002 and co-founder of the International Working Group of Maternal Haemodynamics. He is Chairman of the ISUOG Doppler and vascular imaging group and a member of the ISUOG Safety Committee.