Placental Volumes Measured by 3-Dimensional Ultrasonography in Normal Pregnancies From 12 to 40 Weeks' Gestation
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Data
2008-11-01
Autores
Silva de Paula, Carla Fagundes
Ruano, Rodrigo
Duarte Bonini Campos, Juliana Alvares [UNESP]
Zugaib, Marcelo
Título da Revista
ISSN da Revista
Título de Volume
Editor
Amer Inst Ultrasound Medicine
Resumo
Objective. The purpose of this study was to construct nomograms of placental volumes according to gestational age and estimated fetal weight. Methods. From March to November 2007, placental volumes were prospectively measured by ultrasonography in 295 normal pregnancies from 12 to 40 weeks' gestation and correlated with gestational age and estimated fetal weight. Inclusion criteria were healthy women, singleton pregnancies with normal fetal morphologic characteristics on ultrasonography, and confirmed gestational age by first-trimester ultrasonography. Results. The mean placental volume ranged from 83 cm(3) at 12 weeks to 427.7 cm(3) at 40 weeks. Linear regression yielded the following formula for the expected placental volumes (ePV) according to gestational age (GA): ePV` (cm(3)) = -64.68 + 12.31 x GA (r = 0.572; P < .001). Placental volumes also varied according to estimated fetal weight (EFW), and the following mathematical equation was also obtained by linear regression: ePV = 94.19 + 0.09 x EFW (r = 0.505; P < 0.001). Conclusions. Nomograms of placental volumes according to gestational age and estimated fetal weight were constructed, generating reference values.
Descrição
Palavras-chave
placenta, 3-dimensional ultrasonography, ultrasonography
Como citar
Journal of Ultrasound In Medicine. Laurel: Amer Inst Ultrasound Medicine, v. 27, n. 11, p. 1583-1590, 2008.