There is no single set of charts that match the NSW population allowing comparison of all biometry (bi-parietal diameter (BPD), head circumference (HC), abdominal circumference (AC), femur length (FL) and estimated fetal weight (EFW).
Pregnancies should be dated based on a known Last Menstrual Period (LMP) or a first trimester (<14 weeks) ultrasound and dating should be confirmed at the morphology scan.
The formulas in
should be used by all ultrasound providers in NSW.
Consider fetal growth restriction if any of the following are true.
A fetus with an EFW <10th centile
A fetus that appears asymmetrical with an AC <10th centile
A fetus with an EFW >10th centile that has a 50-centile reduction in EFW between two sets of measures four weeks apart