Fig. 1

Comparison of observed estimated fetal weight (EFW) at 32 weeks’ gestation in the study cohort (bars), with reference values from the INTERGROWTH-21st chart (solid line), the World Health Organization (WHO) chart (dashed line), and the Hadlock chart (dotted line) . The grey bars indicate observations below the 10th centile in the study cohort. Vertical solid, dashed, and dotted lines indicate the 10th centile of the INTERGROWTH-21st, WHO, and Hadlock distributions