- Indications:
– If SFH not possible
– If pregnancy moderate or high risk (see Module 1, Ch 3)
- Recommended frequency: 3 weekly
- Starting from 28 weeks to establish baseline
- Plot EFW based on preferred formula (usually Hadlock)
- Algorithm – see GAP guidance 17
17. Perinatal Institute. GAP Guidance 2020. https://www.perinatal.org.uk/GAPguidance.pdf