Siemer et al reported an equation for estimating the body weight of a fetus weighing <=2,500 grams. The authors are from University Hospital Mannheim.

Patient selection: weight less than 2,500 grams, exam performed less than 7 days from delivery



(1) abdominal circumference in cm (AC)

(2) femur length in cm (FL)

(3) biparietal diameter in cm (BPD)


estimated fetal weight in grams =

= (2101.261 * LN(AC)) + (15.613 * ((FL)^2)) + (0.577 * ((BPD)^3)) - 5948.336

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