Plotting of results of growth scans
Click here for current regional guidance (Aug 2009).
Formula for Estimate Fetal Weight
The evidence for the calculation of estimated fetal weight (EFW) was summarised and circulated in February 2003.
The recommended EFW formula
is that of Hadlock for HC, AC, and FL, as it appears
to perform best across a range of different populations
and fetal weights. For cases where head measurements
are difficult or unreliable, Campbell formula for AC
only should be used.
Hadlock F P, Harris R B, Sharman R S, Deter R L, Park
S K. Estimation of fetal weight with the use of head,
body and femur measurements - a prospective study.
Am J Obstet Gynecol 1985; 151: 333-37.
Campbell S, Wilkin D. Ultrasonic measurement of fetal
abdomen circumference in the estimation of fetal weight.
Br J Obstet Gynaecol 1975; 82: 689-97.