GE LOGIQ A100 Technical Publication page 165

Estimated Fetal Weight (FL/AC)
The Estimated Fetal Weight #2 is computed using the
Hadlock model. (Hadlock, F.P., et al, : "Sonographic
Estimation of Fetal Weight", Radiology, 150: 535–540,
1984)
EFW is determined according to the equation:
EFW=10^(1.304+(0.05281*AC)+(0.1938*FL)–(0.004*AC*
The above formula yields EFW in grams when the AC
and FL are in centimeters.
When EFW is selected, this calculation is made only if
FL/AC are the only available measurements within the set
BPD/HC/AC/FL.
Estimated Fetal Weight (FL/AC/HC)
The Estimated Fetal Weight #3 (EFW) is computed using
a Hadlock, Harris, Sharman, Deter and Park model.
"Estimation of fetal weight with the use of head, body
and femur measurements–A prospective study".
(American Journal of Obstetrics and Gynecology 151:
333–337, 1985)
EFW is determined according to the equation:
EFW=10^(1.326–0.00326*AC*FL)+(0.0107*HC)+0.0438*
The above formula yields EFW in grams, when the FL,
AC and HC measurements are in cm.
When EFW is selected, this calculation is made only if
FL/AC/HC are the only available measurements.
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α 100 User Manual
LOGIQ
2211157–100 Rev 0
FL)).
AC)+(0.158*FL)
OB Measurements
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