The estimated fetal weight can be estimated from fetal ultrasound biometry based on a formula from the INTERGROWTH-21 study.
Patient selection: ultrasound within 1 week of delivery
Parameters:
(1) abdominal circumference (AC) in cm
(2) head circumference (HC) in cm
abdominal circumference in meters =
= (abdominal circumference) / 100
head circumference in meters =
= (head circumference) / 100
X =
= 5.084820 - (54.06633 * ((AC in meters)^3)) - (95.80072 * ((AC in meters)^3) * LN(AC in meters)) + (3.13637 * (HC in meters))
estimated fetal weight in grams =
= EXP(X)
To read more or access our algorithms and calculators, please log in or register.
Specialty: Obstetrics & Gynecology
