The use of three parameters by the equation in Weiner (1985) can offer improved accuracy when compared to equations using one or two parameters.


estimated fetal weight in grams =

=10^(1.6553 + (0.03986 * (head circumference in cm)) + (0.0127 * (abdominal circumference in cm)) + (0.00265 * (biparietal diameter in cm)))


Limitations: Abdominal circumference can be difficult to measure accurately by ultrasound.


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