Document Detail

Fetal head and abdominal circumferences: II. A critical re-evaluation of the relationship to menstrual age.
MedLine Citation:
PMID:  6816816     Owner:  NLM     Status:  MEDLINE    
Dynamic image ultrasound was utilized to re-examine the changes in head and abdominal circumferences (HC, AC) with gestational age in normal fetuses. Data collected in a cross-sectional study of fetal growth were evaluated using mathematical modeling techniques. The results of this analysis indicated that a linear-cubic function optimally fits the HC data (R2 = 97.3%) while the AC data was fitted optimally by a linear function (R2 = 95.5%). The predicted values calculated from these functions were in very close agreement [mean deviation (absolute value): 1.97% (HC), 1.38% (AC)] with those calculated from average functions for HC and AC obtained in a previous longitudinal growth study. Variability was not constant throughout pregnancy for either HC or AC. With HC the normal range changed from +/-1.5 cm to +/-2.5 cm at 28 wk (menstrual age). The AC variability increased progressively with increasing menstrual age and was shown to be related to the predicted AC value. The normal range was found to be 13% of the predicted AC value throughout pregnancy. Based on these results, a new set of normal HC and AC values for the 12-40 wk (menstrual age) period is presented.
R L Deter; R B Harrist; F P Hadlock; R J Carpenter
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of clinical ultrasound : JCU     Volume:  10     ISSN:  0091-2751     ISO Abbreviation:  J Clin Ultrasound     Publication Date:  1982 Oct 
Date Detail:
Created Date:  1983-02-14     Completed Date:  1983-02-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401663     Medline TA:  J Clin Ultrasound     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  365-72     Citation Subset:  IM    
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MeSH Terms
Abdomen / anatomy & histology*
Fetus / anatomy & histology*
Gestational Age*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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