Fetal size and dating charts recommended for clinical obstetric practice

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Objective: The main purpose of this study is to derive a dating formula for the Nigerian obstetric population, quantify its prediction error, and compare its performance with existing published formulae. Materials and Methods: The crown-rump length CRL of fetuses without risk for fetal growth restriction were plotted against menstrual age to obtain a scatter plot from which we derived the best-fit fractional polynomial regression model for estimating gestational age GA. The accuracy of the formula was compared with that of existing formula in another data set of 88 fetuses. The mean prediction error was 0.

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Metrics details.

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Pettker, MD; James D. Goldberg, MD; and Yasser Y. This document reflects emerging clinical and scientific advances as of the date issued and is subject to change.

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