Cancer Risk among Children Born after Assisted Conception

From the Institute of Child Health, University College London (C.L.W., B.J.B., A.G.S.), and the Reproductive Medicine Unit, University College London Hospitals (M.D.), London; the Childhood Cancer Research Group, Department of Paediatrics, University of Oxford, Oxford (K.J.B., C.A.S., M.F.G.M.); and the Paediatric Oncology Department, Royal Hospital for Sick Children, University of Edinburgh, Edinburgh (W.H.W.) — all in the United Kingdom. Address reprint requests to Dr. Sutcliffe at the General and Adolescent Paediatric Unit, Institute of Child Health, University College London, 30 Guilford St., London WC1N 1EH, United Kingdom, or at [email protected].