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Type: Artigo de periódico
Title: Curve Of Amniotic Fluid Index Measurements In Low-risk Pregnancy.
Author: Machado, Maria Regina
Cecatti, Jose Guilherme
Krupa, Fabiana
Faundes, Anibal
Abstract: To establish a curve of amniotic fluid index [AFI] measurements from the 20th to the 42nd week of pregnancy. A prospective and descriptive study was performed, in which an independent sample of 2,868 low-risk pregnant women were studied using routine ultrasound, including fetal biometry and measurement of AFI. Data were analysed using multiple linear regression, and constructing a curve using 2.5th, 10th, 50th, 90th and 97.5th percentiles of the AFI measurements, according to gestational age, and after submitting values to smoothing process using quadratic polynomial adjustment. There was a significant variation in AFI measurements at the different gestational ages. The 50th percentile remained practically constant at approximately 150 mm between the 20th and 33rd week, after which there was a decline in volume, which became evident after the 38th week. At the 40th week, the 10th percentile was around 62 mm and the 2.5th percentile around 33 mm. The curve of percentiles of AFI measurements in low-risk pregnant women showed significant decrease with gestational age, especially after the 33rd week. These data should be validated for a diagnosis of increased or decreased volumes of amniotic fluid at specific gestational ages.
Subject: Adolescent
Amniotic Fluid
Gestational Age
Linear Models
Middle Aged
Pregnancy Trimester, Second
Pregnancy Trimester, Third
Prospective Studies
Reference Values
Ultrasonography, Prenatal
Citation: Acta Obstetricia Et Gynecologica Scandinavica. v. 86, n. 1, p. 37-41, 2007.
Rights: fechado
Identifier DOI: 10.1080/00016340600994976
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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