Reference Charts of Fetal Biometric Parameters in 31,476 Brazilian Singleton Pregnancies

Reference Charts of Fetal Biometric Parameters in 31,476 Brazilian Singleton Pregnancies

Author Araujo Junior, Edward Autor UNIFESP Google Scholar
Martins Santana, Eduardo Felix Autor UNIFESP Google Scholar
Martins, Wellington P. Google Scholar
Elito Junior, Julio Autor UNIFESP Google Scholar
Ruano, Rodrigo Google Scholar
Pires, Claudio Rodrigues Google Scholar
Zanforlin Filho, Sebastiao Marques Google Scholar
Institution Referral Ctr Teaching Diagnost Imaging
Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Ultrasonog & Retraining Med Sch Ribeirao Preto
Texas Childrens Hosp
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 low-risk 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 (R-2).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 biomettic parameters and gestational age, best represented by second-degree equations, with R-2 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.
Keywords Brazilian population
fetal biometric parameters
obstetric ultrasound
reference charts
sonography
Language English
Date 2014-07-01
Published in Journal of Ultrasound in Medicine. Laurel: Amer Inst Ultrasound Medicine, v. 33, n. 7, p. 1185-1191, 2014.
ISSN 0278-4297 (Sherpa/Romeo, impact factor)
Publisher Amer Inst Ultrasound Medicine
Extent 1185-1191
Origin http://dx.doi.org/10.7863/ultra.33.7.1185
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000338003300008
URI http://repositorio.unifesp.br/handle/11600/37914

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