Implementation of the INTERGROWTH-21 st Project in the United States

Project in the United States MK Dighe, IO Frederick, HF Andersen, MG Gravett, SE Abbott, AA Carter, H Algren, DA Rocco, SA Waller, TK Sorensen, D Enquobahrie, I Blakey, HE Knight, L Cheikh Ismail, for the International Fetal and Newborn Growth Consortium for the 21 Century (INTERGROWTH-21) a Department of Radiology, University of Washington School of Medicine, Seattle, WA, USA b Center for Perinatal Studies, Swedish Medical Center, Seattle, WA, USA c Department of Obstetrics & Gynecology, Department of Clinical Research, Providence Regional Medical Center Everett, Everett, WA, USA d Department of Obstetrics & Gynecology, University of Washington School of Medicine, Seattle, WA, USA e Global Alliance to Prevent Prematurity and Stillbirth (GAPPS), Seattle Children’s, Seattle, WA, USA f Nuffield Department of Obstetrics & Gynaecology, and Oxford Maternal & Perinatal Health Institute, Green Templeton College, University of Oxford, Oxford, UK Correspondence: Dr L Cheikh Ismail, Nuffield Department of Obstetrics & Gynaecology, University of Oxford, Women’s Centre, Level 3, John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK. Email: leila.cheikhismail@obs-gyn.ox.ac.uk