Obstetrics• Updated 21 October 2026
Fetal Growth Scan
A scan in later pregnancy to check the baby's growth, fluid and blood flow.
Results: Same day
Quick Summary
Primary Purpose
To check growth when there are concerns such as diabetes, high blood pressure or a small or large bump.
What It Measures
Baby's measurements, fluid and Doppler blood flow.
Preparation
No special preparation.
Overview
Growth scans estimate the baby's weight, which has a margin of error.
Doppler checks blood flow through the cord.
What It Measures
Growth
Head, tummy and thigh measurements.
Doppler
Blood flow.
How It's Performed
- 01
Scan
Over the tummy.
- 02
Measurements
Plotted on growth charts.
- 03
Plan
Your doctor plans follow-up.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- Ultrasound(opens in a new tab) · MedlinePlus, US National Library of Medicine
- Ultrasound scan(opens in a new tab) · NHS