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Ultrasound comparable to educated guess in predicting birth weight. (Head-to-Head Comparison).
LOS ANGELES -- A guess is nearly as good in predicting birth weight at term as estimates based on ultrasound measurements or maternal characteristics, Dr. Gerard G. Nahum said at the annual meeting of the American College of Obstetricians and Gynecologists.
A head-to-head comparison of various methods of predicting birth weight at 37-42 weeks of gestation in 81 nondiabetic gravid women found that none of 20 ultrasound fetal biometric algorithms was significantly more accurate than guesses based on population-specific birth weights or estimates based on maternal characteristics, said Dr. Nahum of Duke University, Durham, N.C.
The estimates based on ultrasound measurements erred by a mean of 8%-18% of birth weight, or 266-646 g. Estimates based on maternal characteristics erred by 8%-10% of birth weight. Guesses based on population-specific birth weights were slightly less accurate.
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Source: HighBeam Research, Ultrasound comparable to educated guess in predicting birth weight....