Analysis of biparietal diameter as an accurate indicator of gestational age.

Publication/Presentation Date

8-1-1980

Abstract

To date, there have been 25 studies attempting to correlate biparietal diameter and gestational age; of these, 17 meet specific criteria and thus are included in this evaluation. Although all studies have shown an increase in biparietal diameter with advancing gestational age, between 17 wk and term there is a discrepancy of approximately 3 wk. In this evaluation the charts are compared and the variations analyzed. An ideal table is constructed by combining the mean gestational age, calculated from a statistical analysis, and the variation at each millimeter point, determined by comparison of all the studies. It is hoped that this new 90% composite table, which consists of a range of gestational ages in weeks for each biparietal diameter, will not only provide more realistic indications of fetal age but also will serve as a reminder to sonographers, obstetricians, and patients of the relative accuracy and variations of biparietal diameter measurements.

Volume

8

Issue

4

First Page

319

Last Page

326

ISSN

0091-2751

Disciplines

Medicine and Health Sciences

PubMedID

6772680

Department(s)

Department of Obstetrics and Gynecology

Document Type

Article

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