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Reference range for amniotic fluid index measurements in a Brazilian population

  • Edward Araujo Júnior EMAIL logo , Wellington P. Martins , David Baptista Silva Pares , Claudio Rodrigues Pires und Sebastião Marques Zanforlin Filho
Veröffentlicht/Copyright: 16. Januar 2014
Journal of Perinatal Medicine
Aus der Zeitschrift Journal of Perinatal Medicine Band 42 Heft 4

Abstract

Objective: The aim of this study was to determine the reference range for amniotic fluid index (AFI) measurements in a large sample of the Brazilian population.

Methods: This was a retrospective cross-sectional study on 3837 normal singleton pregnancies between 18+0 and 38+6 weeks of pregnancy. The AFI was measured from the largest vertical pockets of amniotic fluid in the four quadrants of the uterine cavity. To assess the correlation between AFI and gestational age (GA), polynomial equations were calculated, with adjustments using the determination coefficient (R2).

Results: The mean maternal age and gestational age were 27.01±6.57 years and 30.43±5.29 weeks, respectively. The mean AFI ranged from 12.2±2.6 cm at 18 weeks to 11.6±6.0 cm at 38 weeks of pregnancy. The correlation between AFI and GA was best represented by a linear equation: AFI=17.78–0.153*GA (R2=0.027).

Conclusion: We established the reference range for the AFI in a large sample of the Brazilian population. This reference range can be used to monitor deviations in the volume of amniotic fluid in fetuses at high risk for intrauterine growth disturbances.

Keywords: Amniotic fluid index; Brazilian population; reference range
Corresponding author: Prof. Edward Araujo Júnior, PhD, Referral Center for Teaching of Diagnostic Imaging (CETRUS), Rua Carlos Weber, 956, apto. 113 Visage, Alto da Lapa, São Paulo-SP, CEP 05303-000, Brazil, Tel.: +55 11 37965944, Fax: +55 11 37965944, E-mail:

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The authors stated that there are no conflicts of interest regarding the publication of this article.

Received: 2013-10-28
Accepted: 2013-11-25
Published Online: 2014-1-16
Published in Print: 2014-7-1

©2014 by Walter de Gruyter Berlin/Boston

Artikel in diesem Heft

  1. Frontmatter
  2. Review articles
  3. The relationship between gestational weight gain and fetal growth: time to take stock?
  4. Risk factors for pregnancy-associated venous thromboembolism: a review
  5. Academy’s Corner
  6. Africa is only 14 km away from my country
  7. Primary prevention of preterm birth
  8. Original articles – Obstetrics
  9. Mother knows best? Comparing primiparous parturients’ expectations and predictions with actual birth outcomes
  10. Silent chorioamnionitis and associated pregnancy outcomes: a review of clinical data gathered over a 16-year period
  11. Clinical factors associated with failed trials of labor in late preterm and term twin pregnancies
  12. Relation of placental diagnosis in stillbirth to fetal maceration and gestational age at delivery
  13. Evaluation of a novel placental alpha microglobulin-1 (PAMG-1) test to predict spontaneous preterm delivery
  14. The relationship of praise/criticism to learning during obstetrical simulation: a randomized clinical trial
  15. Sickle cell disease and pregnancy outcomes: population-based study on 8.8 million births
  16. Differences between external and internal fetal heart rate monitoring during the second stage of labor: a prospective observational study
  17. Perinatal management of preterm premature ruptured membranes affects neonatal prognosis
  18. Impact of the nitric oxide-donor pentaerythrityl-tetranitrate on perinatal outcome in risk pregnancies: a prospective, randomized, double-blinded trial
  19. Umbilical vein volume flow in monochorionic twin pairs at 11–14 weeks
  20. Gestational weight gain according to number of fetuses in Japanese women
  21. Original article – Fetus
  22. Prenatal diagnosis of sex chromosome aneuploidies and disorders of sex development – a retrospective analysis of 11-year data
  23. Short communication
  24. Reference range for amniotic fluid index measurements in a Brazilian population
  25. Congress Calendar
  26. Congress Calendar
https://doi.org/10.1515/jpm-2013-0293
Schlagwörter für diesen Artikel
Amniotic fluid index; Brazilian population; reference range

Artikel in diesem Heft

  1. Frontmatter
  2. Review articles
  3. The relationship between gestational weight gain and fetal growth: time to take stock?
  4. Risk factors for pregnancy-associated venous thromboembolism: a review
  5. Academy’s Corner
  6. Africa is only 14 km away from my country
  7. Primary prevention of preterm birth
  8. Original articles – Obstetrics
  9. Mother knows best? Comparing primiparous parturients’ expectations and predictions with actual birth outcomes
  10. Silent chorioamnionitis and associated pregnancy outcomes: a review of clinical data gathered over a 16-year period
  11. Clinical factors associated with failed trials of labor in late preterm and term twin pregnancies
  12. Relation of placental diagnosis in stillbirth to fetal maceration and gestational age at delivery
  13. Evaluation of a novel placental alpha microglobulin-1 (PAMG-1) test to predict spontaneous preterm delivery
  14. The relationship of praise/criticism to learning during obstetrical simulation: a randomized clinical trial
  15. Sickle cell disease and pregnancy outcomes: population-based study on 8.8 million births
  16. Differences between external and internal fetal heart rate monitoring during the second stage of labor: a prospective observational study
  17. Perinatal management of preterm premature ruptured membranes affects neonatal prognosis
  18. Impact of the nitric oxide-donor pentaerythrityl-tetranitrate on perinatal outcome in risk pregnancies: a prospective, randomized, double-blinded trial
  19. Umbilical vein volume flow in monochorionic twin pairs at 11–14 weeks
  20. Gestational weight gain according to number of fetuses in Japanese women
  21. Original article – Fetus
  22. Prenatal diagnosis of sex chromosome aneuploidies and disorders of sex development – a retrospective analysis of 11-year data
  23. Short communication
  24. Reference range for amniotic fluid index measurements in a Brazilian population
  25. Congress Calendar
  26. Congress Calendar
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