Improved prediction of gestational age from fetal head measurements

P. M. Doubilet, R. A. Greenes

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


Gestational age estimation based on biparietal diameter alone was compared with three approaches to age prediction that consider head shape: area-corrected biparietal diameter, circumference-corrected biparietal diameter, and head circumference. The analysis was based on 67 fetuses (13-41 weeks) in whom age was known with a high degree of accuracy, using a crown-rump length measurement from a prior first trimester sonographic examination. The three methods that consider head shape are more precise than biparietal diameter alone (p < 0.05 for second trimester cases, less significantly demonstrated for third trimester cases). While the three appear to be equal to one another in accuracy, area correction may be the preferred approach based on theoretical grounds and on convenience. It is easy and can be used in conjunction with any formula (or table) now applied to biparietal diameter alone.

Original languageEnglish (US)
Pages (from-to)797-800
Number of pages4
JournalAmerican Journal of Roentgenology
Issue number4
StatePublished - 1984
Externally publishedYes

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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