Advantages of the population-based approach to pregnancy dating demonstrated with results from 23 020 ultrasound examinations

Ultrasound in Obstetrics & Gynecology, 04/26/2012

This study confirms the results from previous studies; median biases were negligible with term predictions from the population–based model, while those from the traditional models varied substantially. The biases, which have clinical implications, seem inevitable with the sample–based models, which, even when tentatively calibrated, will perform unsatisfactorily.

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