Merz et al reported an equation for estimating fetal weight from ultrasonographic measurements. The authors are from Universitats-Frauenklinik Mainz.

Patient selection: 24 to 42 weeks of gestation with measurements less than 7 days from delivery



(1) abdominal circumference in cm (AC)

(2) biparietal diameter in cm (BPD)


estimated fetal weight in grams =

= (157.07186 * (AC)) + (15.90391 * ((BPD)^2)) - 3200.40479

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