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Objective

To identify whether the addition of Hadlock’s abdominal circumference (AC) percentiles to Williams’ growth curve percentile enhanced the identification of at-risk fetuses with fetal growth restriction (FGR), as defined by abnormal fetal umbilical artery Doppler (UAD) flow.

Study Design

We performed a retrospective study of singleton pregnancies diagnosed with FGR (estimated fetal weight (EFW) of< 10% on Hadlock’s growth curve) who had prenatal care and delivered from 6/14-5/15. Aneuploid fetuses and fetuses with major congenital anomalies were excluded. Our primary outcome was abnormal UAD, defined as absent (AEDF) or reversed end-diastolic flow (REDF). Elevated systolic/diastolic (S/D) ratios were assessed. Outcomes are reported as the proportion of patients identified with FGR (combination of Williams’ EFW and Hadlock’s AC percentile) divided by the total number of fetuses identified with …