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Reference intervals for the cross sectional area of the umbilical cord during gestation

  • Fernando Alves Togni , Edward Araujo Júnior , Antonio Fernandes Moron , Flávio Augusto Prado Vasques , Maria Regina Torloni , Luciano Marcondes Machado Nardozza and Hélio Antonio Guimarães Filho
Published/Copyright: March 7, 2007
Journal of Perinatal Medicine
From the journal Volume 35 Issue 2

Abstract

Objective: To establish reference values for the sonographic cross-sectional area of the umbilical cord during gestation and to correlate them with fetal anthropometric parameters.

Methods: A cross-sectional study was performed involving 312 normal pregnant women at gestational ages 24–39 weeks. Measurement of the cross-sectional area of umbilical cord was performed on a plane adjacent to the insertion of the cord into fetal abdomen. The following anthropometric parameters were calculated: biparietal diameter, head circumference, abdominal circumference and femur length. A polynomial regression analysis identified the curves that were better adjusted to the average and standard deviation according to gestational age. Spearman correlation was used to evaluate the correlation of the cross-sectional area of umbilical cord with fetal anthropometric parameters.

Results: A statistically significant correlation was observed between the cord cross-sectional area and gestational age (r=0.376, P<0.001, CI 95%[0.276; 0.467]).

Conclusions: The reference values of the cross-sectional area of umbilical cord increased according to gestational age until the 33rd week and are related to parameters of fetal growth.

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Corresponding author: Edward Araujo Júnior Rua Antonio Borba, 192 apt. 43 Alto de Pinheiros-São Paulo – SP 05451-070 Brazil Tel.: +55-11-30228538/55-11-93685430 Fax: +55-11-36728114

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Published Online: 2007-03-07
Published in Print: 2007-04-01

©2007 by Walter de Gruyter Berlin New York

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