Reference charts of fetal biometric parameters in 31,476 Brazilian singleton pregnancies

Edward Araujo Júnior, Eduardo Félix Martins Santana, Wellington P. Martins, Julio Elito Júnior, Rodrigo Ruano, Claudio Rodrigues Pires, Sebastião Marques Zanforlin Filho

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Objectives-The purpose of this study was to establish reference charts of fetal biometric parameters measured by 2-dimensional sonography in a large Brazilian population. Methods-A cross-sectional retrospective study was conducted including 31,476 lowrisk singleton pregnancies between 18 and 38 weeks' gestation. The following fetal parameters were measured: biparietal diameter, head circumference, abdominal circumference, femur length, and estimated fetal weight. To assess the correlation between the fetal biometric parameters and gestational age, polynomial regression models were created, with adjustments made by the determination coefficient (R2). Results-The means ± SDs of the biparietal diameter, head circumference, abdominal circumference, femur length, and estimated fetal weight measurements at 18 and 38 weeks were 4.2 ± 2.34 and 9.1 ± 4.0 cm, 15.3 ± 7.56 and 32.3 ± 11.75 cm, 13.3 ± 10.42 and 33.4 ± 20.06 cm, 2.8 ± 2.17 and 7.2 ± 3.58 cm, and 256.34 ± 34.03 and 3169.55 ± 416.93 g, respectively. Strong correlations were observed between all fetal biometric parameters and gestational age, best represented by second-degree equations, with R2 values of 0.95, 0.96, 0.95, 0.95, and 0.95 for biparietal diameter, head circumference, abdominal circumference, femur length, and estimated fetal weight. Conclusions-Fetal biometric parameters were determined for a large Brazilian population, and they may serve as reference values in cases with a high risk of intrauterine growth disorders.

Original languageEnglish (US)
Pages (from-to)1185-1191
Number of pages7
JournalJournal of Ultrasound in Medicine
Volume33
Issue number7
DOIs
StatePublished - Jul 1 2014
Externally publishedYes

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Keywords

  • Brazilian population
  • Fetal biometric parameters
  • Obstetric ultrasound
  • Reference charts
  • Sonography

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

Cite this

Júnior, E. A., Santana, E. F. M., Martins, W. P., Júnior, J. E., Ruano, R., Pires, C. R., & Filho, S. M. Z. (2014). Reference charts of fetal biometric parameters in 31,476 Brazilian singleton pregnancies. Journal of Ultrasound in Medicine, 33(7), 1185-1191. https://doi.org/10.7863/ultra.33.7.1185