Delivery timing in FGR based on UA Doppler and weight

UA Doppler indices	Additional patient considerations	Recommended timing for delivery
Normal	EFW ≥3^rd and <10^th percentile and no comorbidities	38+0 to 39+0 weeks or at diagnosis if diagnosed later
	EFW ≥3^rd and <10^th percentile and oligohydramnios or comorbidities	Individualize timing, but 34+0 to 37+6 weeks for most patients or at diagnosis if diagnosed later
	EFW <3^rd percentile and no comorbidities	37+0 weeks or at diagnosis if diagnosed later
Abnormal (>95^th percentile)		37+0 weeks or at diagnosis if diagnosed later
Absent diastolic flow		33+0 to 34+0 weeks or at diagnosis if diagnosed later
Reversed diastolic flow		30+0 to 32+0 weeks or at diagnosis if diagnosed later

These are general recommendations. The timing of delivery in an individual patient is based on a combination of factors, including UA Doppler findings, estimated fetal weight, gestational age, results of antenatal fetal surveillance (eg, nonstress test, biophysical profile score), amniotic fluid volume, and severity of maternal comorbidities.

EFW: estimated fetal weight; FGR: fetal growth restriction; UA: umbilical artery.

Adapted from: Martins JG, Biggio JR, Abuhamad A. Society for Maternal-Fetal Medicine Consult Series #52: Diagnosis and management of fetal growth restriction. Am J Obstet Gynecol 2020; 223:B2.

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Delivery timing in FGR based on UA Doppler and weight