Surveillance & delivery timing based on SMFM Consult Series #52.
UA Doppler-driven thresholds, corticosteroid eligibility, and BPP flagging.
ProtocolSMFM #52
ReferenceACOG PB #204
UseEducational / QA
⚠Informational use only. This tool is for educational and quality-assurance purposes and does not provide medical advice. All therapeutic decisions must be made by a qualified healthcare provider in the context of the individual patient.
Patient Inputs
32.4 = 32w4d | also accepts 32+4 or 32w4d
FGR = EFW <10th (or AC <10th per SMFM). Enter 0–99.
SMFM thresholds:REDF → 30–32w •
AEDF → 33–34w •
Decreased flow → ~37w •
Severe FGR (EFW <3rd, normal UA) → ~37w •
Normal UA → 38–39w
Clinical Decision Output
Risk Tier
—
Recommended Delivery Window
—
Surveillance Intensity
—
Antenatal Corticosteroids
—
Suggested Surveillance Schedule
—Generate a plan to see the schedule.
Protocol Basis
SMFM Consult Series #52 (2020): Medically indicated late-preterm and early-term deliveries — standardized approach to FGR diagnosis, surveillance, and delivery timing.
ACOG Practice Bulletin #204: Fetal Growth Restriction — supports Doppler-informed surveillance and delivery planning for AEDF/REDF.
Delivery windows reflect widely cited SMFM thresholds; individualize for maternal indications, NICU capacity, and patient values.
Safety disclaimer: Nonreassuring NST/BPP, maternal indications (preeclampsia, HELLP, abruption), fetal anomalies, infection, PPROM, and local NICU constraints may justify earlier delivery than the Doppler-only windows shown here. This tool does not replace clinical judgment.
About FGRManager
FGRManager is a physician-facing clinical decision-support tool designed to assist
Maternal-Fetal Medicine specialists and obstetricians in managing pregnancies complicated by
fetal growth restriction (FGR). It implements the delivery-timing thresholds and
surveillance framework from the Society for Maternal-Fetal Medicine (SMFM) Consult Series #52.
What This Tool Does
Classifies FGR severity based on EFW percentile and umbilical artery (UA) Doppler category.
Recommends a delivery window aligned with SMFM thresholds (REDF: 30–32w; AEDF: 33–34w; decreased diastolic flow or severe FGR: ~37w; normal UA with EFW 3–10th: 38–39w).
Calculates a countdown from current gestational age to the target delivery window.
Generates a surveillance schedule (NST/BPP frequency, UA Doppler interval, growth scan cadence) keyed to Doppler category.
Flags antenatal corticosteroid eligibility when preterm delivery is anticipated within 7 days.
Flags potentially nonreassuring BPP scores for immediate clinical attention.
What This Tool Does NOT Do
It does not replace clinical judgment or individualized patient assessment.
It does not account for maternal indications (preeclampsia, HELLP, abruption), fetal anomalies, PPROM, or local NICU capacity.
It does not provide a definitive plan — always adapt to the specific patient context.
For Patients
If your provider has shared this tool with you, it means your baby's growth is being carefully monitored.
Fetal growth restriction means your baby may be growing more slowly than expected. Your care team uses
tools like this to decide how often to check on your baby and when the safest time to deliver might be.
Please ask your provider any questions you have about your care plan.