Fetal growth restriction (FGR) increases the risk for perinatal morbidity and mortality. The Society of Maternal Fetal Medicine expanded the definition of FGR to independently include abdominal circumference (AC) <10th percentile for gestational age (GA), regardless of estimated fetal weight (EFW). While studies have shown increased detection of small for GA neonates with expanded definition, no studies have evaluated the likelihood of abnormal umbilical artery Dopplers (UAD) with expanded definition. The objective of this study was to compare the likelihood of identifying UAD abnormalities in fetuses with normal EFW and restricted AC versus EFW alone. Single institution retrospective cohort study of fetal growth ultrasounds meeting criteria for FGR either by EFW <10th percentile or AC <10th percentile with normal EFW. Those with FGR by AC alone were compared with those with FGR by EFW. Primary outcome was prevalence of UAD abnormalities, including elevated systolic/diastolic ratio, and absent and/or reversed end diastolic velocity. Receiver operator characteristic curves were generated to compare predictive value of UAD abnormalities by FGR definition. Six hundred nineteen scans met criteria for FGR between 11/2020-06/2021, with 441 (71%) meeting definition by EFW and 178 (29%) by AC criteria alone. Baseline characteristics were similar between groups. FGR by AC alone was identified earlier (30.4 ±3.3 vs 35.4 ±3.0 weeks gestation, p <0.001) with higher proportion identified before 32 weeks (70% vs 11%, p <0.001). Proportion of abnormal UAD were similar between groups (15% vs 15%, aOR 1.12, 95% CI 0.61-2.23). Use of EFW alone would have failed to identify 29% of abnormal UAD. A combined definition of FGR had the highest detection of abnormal UAD (area under curve 0.78 vs AC alone 0.73 vs EFW alone 0.69). A definition of FGR that considers both EFW and AC improves detection of abnormal UAD.