Customized estimated fetal weight: a novel antenatal tool to diagnose abnormal fetal growth

Objective We sought to apply customized standards to ultrasound-derived estimated fetal weight (EFW), and assess the frequency of abnormal growth when compared to population-based standards. We also evaluated association with adverse perinatal outcomes. Study Design This was a historical cohort using prenatal ultrasound examination data at ≥24 weeks over a 1-year period. Ultrasound-derived EFW and growth percentile (population-based EFW [popEFW]) were reported and compared to a customized EFW (custEFW). Results In all, 782 women met inclusion criteria. More fetuses were identified as small for gestational age (SGA) (15.1% vs 3.8%; P P Conclusion CustEFW was a better predictor of abnormal birthweight and adverse outcomes compared to traditional popEFW standards.