Limitations:
Abdominal circumference can be difficult to measure accurately by ultrasound.
Hadlock (1984)
estimated fetal weight in grams =
=10 ^ (1.4787 + (0.001837 * ((biparietal diameter in cm)^2)) + (0.0458 * (abdominal circumference in cm)) + (0.158 * (femoral diaphysis length in cm)) - (0.003343 * (abdominal circumference in cm) * (femoral diaphysis length in cm)))
Hadlock (1985)
estimated fetal weight in grams =
=10 ^ (1.335 + (0.0316 * (biparietal diameter in cm)) + (0.0457 * (abdominal circumference in cm)) + (0.1623 * (femoral diaphysis length in cm)) - (0.0034 * (abdominal circumference in cm) * (femoral diaphysis length in cm)))
Woo (1985)
estimated fetal weight in grams =
=10 ^ (1.13705 + (0.15549 * (biparietal diameter in cm))+(0.04864 * (abdominal circumference in cm)) + (0.037769 * (femoral diaphysis length in cm)) - (0.00279682 * (biparietal diameter in cm) * (abdominal circumference in cm)) - (0.000494529 * (abdominal circumference in cm) * (femoral diaphysis length in cm)))
Woo (1986)
estimated fetal weight in grams =
= (1.4 * ((biparietal diameter in cm) * (abdominal circumference in cm) * (femoral diaphysis length))) - 200
