Umbilical Artery Doppler
Perform when Gestational Age (GA) is greater than 24 weeks and:
1. Abdominal Circumference (AC) < 10th percentile
2. Estimated Fetal weight (EFW) < 10th percentile
Call to the referring provider is required for all patients with AC or EFW <10th percentile. In addition, absent or reversed diastolic flow is a critical finding which may have time sensitive management implications. These should be reported as “Absent diastolic flow” or “Reversed diastolic flow” rather than using a resistive index number or percentile.