Faschingbauer et al reported an equation for estimating the weight of a small-for-gestational age (SGA) fetus. The authors are from University Hospital Erlangen, Rheinische Friedrich-Wilhelms-University Bonn, Diakonischem Dienste Hanover Frauenkliniken and University of Erlangen-Nuremberg.
Patient selection: small-for-gestational age fetus
Parameters:
(1) biparietal diameter in mm (BPD)
(2) head circumference in mm (HC)
(3) abdominal circumference in mm (AC)
(4) femur length in mm (FL)
(5) sex
(6) gestational age in days (GA)
(7) symmetry of growth
Parameter
Points
biparietal diameter
(0.0057122*(BPD))-(0.0000177*((BPD)^2))
head circumference
(0.0011282*(HC))-(0.0000018*((HC)^2))
abdominal circumference
(0.0201147*(AC))-(0.0000297*((AC)^2))
femur length
(0.0183081*(FL))-(0.0001007*((FL)^2))
gestational age
0.0064505 * (GA)
Parameter
Finding
Points
sex
female
0
male
0.0397563
symmetry of growth
symmetrical
0
asymmetrical
0.0096528
X =
= SUM(points for all of the parameters) + 1.3734627
estimated fetal weight in grams =
= EXP(X)
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