The RCOG Green-Top Guideline for the Investigation and Management of the Small-for-Gestational- Age Fetus (2013) is available here: 
RCOG Green Top Guideline 31
The guideline reviews the available evidence and recommends
- the use of standardised fundal height measurement
- use of customised growth charts to plot fundal height and estimated fetal weight
- reviews risk factors for fetal growth restriction and makes recommendations for surveillance by serial scans
- outlines management protocols for the SGA fetus in early and late pregnancy
NHS Ultrasound and Doppler Resources
The Perinatal Institute and the British Medical Ultrasound Society have undertaken a national survey to ascertain current capability and training status to fulfil the requirements of NHS England’s Saving Babies Lives Care Bundle v2. (2019)
Resources
Presentations from Lorraine Walsh and David Cole
EFW Audit Tool
This tool helps determine the accuracy of ultrasound estimated fetal weight (EFW) after adjusting for the interval between date of scan and date of delivery. It assumes that there was normal growth during the interval between the scan measurement and weight at birth - i.e. it is not designed to be used in pregnancies where abnormal growth was suspected.
