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We describe new charts and tables for dating pregnancies derived from data collected in a study designed to enable the construction of these and charts of fetal size. This was a prospective study in which 663 fetuses seen in the routine ultrasound clinic in a London teaching hospital were scanned once only for the purpose of this study. We discuss the statistical methodology in detail and compare the new charts with other published charts. We suggest that the differences seen may be due to variation in study methodology.

Original publication

DOI

10.1046/j.1469-0705.1997.10030174.x

Type

Journal article

Journal

Ultrasound Obstet Gynecol

Publication Date

09/1997

Volume

10

Pages

174 - 191

Keywords

Cephalometry, Cross-Sectional Studies, Embryonic and Fetal Development, Female, Gestational Age, Humans, Pregnancy, Prospective Studies, Regression Analysis, Reproducibility of Results, Sensitivity and Specificity, Skull, Ultrasonography, Prenatal