Normal ranges by corrected gestational age at scan for bFFE assessment of left ventricular output (A), end-diastolic volume (B), end-systolic volume (C) and ejection fraction (D). Normal ranges by corrected gestational age at scan for bFFE assessment of left ventricular output (A), end-diastolic volume (B), end-systolic volume (C) and ejection fraction (D). Alan M Groves et al. Arch Dis Child Fetal Neonatal Ed 2011;96:F86-F91 Copyright © BMJ Publishing Group Ltd & Royal College of Paediatrics and Child Health. All rights reserved.