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Analysis of biparietal diameter as an accurate indicator of gestational age
Author(s) -
Kurtz Alfred B.,
Wapner Ronald J.,
Kurtz Robert J.,
Dershaw D. David,
Rubin Carl S.,
ColeBeuglet Catherine,
Goldberg Barry B.
Publication year - 1980
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.1870080406
Subject(s) - biparietal diameter , medicine , gestational age , obstetrics , gestation , pregnancy , statistical analysis , statistics , mathematics , genetics , head circumference , biology
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.