Module 1 - GAP Theory
Module 2 - GAP Practice

3.3 First SFH below the 10th centile

​A first SFH measurement below the 10th centile MAY be an indication of SGA and of potential concern as a single measurement cannot reassure that the growth rate is normal. Therefore it is an indication for an ultrasound scan to determine the EFW which should be plotted, with further management as set out in the GAP guidance17

The mother should be told that a fundal height measurement is an assessment of the uterus and its contents, while a scan will be able to estimate the baby’s weight.​


17. GAP Guidance. Perinatal Institute 2020. https://www.perinatal.org.uk/GAPguidance.pdf