Lung-to-head ratio: a need to unify the technique.

†Fetal Medicine Unit of the University Hospital Brugmann, Brussels, Belgium; ‡Department of Obstetrics and Gynecology, Center for Integral Assistance to Women’s Health, State University of Campinas Medical School, Campinas, Brazil; §Harris Birthright Research Centre of Fetal Medicine, King’s College Hospital, London, UK; ¶Department of Fetal Medicine, University College London NHS Foundation Trust, London, UK *Correspondence: Dr J. Jani, CHU Brugmann, Department of Obstetrics and Gynecology, Place A. Van Gehuchten n◦4, 1020 Bruxelles, Belgium (e-mail: [email protected])