PMID: 9539274Apr 16, 1998Paper

Four-quadrant assessment of gestational age-specific values of amniotic fluid volume in uncomplicated pregnancies

Acta Obstetricia Et Gynecologica Scandinavica
M H AlleyA Dimitrov

Abstract

The purpose of this study was to establish a normative scale of amniotic fluid index (AFI) throughout gestation in uncomplicated singleton pregnancies, and to identify the lower and upper limits for each gestational week. Four-quadrant assessment of amniotic fluid volume (AFV) was performed prospectively in 750 uncomplicated pregnancies between 16 and 43 weeks. The logarithmic transformations were used to get the data in Gaussian distribution. The means, and the 90%, 95% and 98% confidence intervals at each week of gestation were calculated from polynomial regression equation. Statistical differences in AFIs among gestational age groups were tested. The amniotic fluid index observations from regression equation curve were stratified in week-specific normative curve. The variations between mean AFI of the total population and the means of the preterm, term and postdate pregnancies were statistically significant (p<0.0001). The 90%, 95% and 98% confidence limits about the mean (12.5 cm) were 5.4 to 20.6, 4.2 to 22.3, 1.8 to 25.8 cm, respectively in term gestation. The 5th and 95th percentile serves as lower and upper limits of normal, respectively. Gestational age-specific values of AFI were established, determining the significa...Continue Reading

Citations

Nov 4, 2015·Prenatal Diagnosis·Myriam L RachidFrançoise Muller
Oct 2, 2015·Prenatal Diagnosis·Bichr AllafFrançoise Muller
Jun 18, 2016·Journal of Clinical Imaging Science·Ayşegül Altunkeser, Muslu Kazım Körez
Nov 17, 2009·Pediatric Research·Arnaud GarnierFrançoise Muller

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