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Related Experiment Videos

Amniotic fluid index: correlation with amniotic fluid volume.

I A Hoskins1, P G McGovern, S A Ordorica

  • 1Department of Obstetrics and Gynecology, New York University Medical Center, New York 10016.

American Journal of Perinatology
|September 1, 1992
PubMed
Summary

Amniotic fluid index (AFI) in normal pregnancies follows a predictable pattern, increasing until 32 weeks then declining. Amniotic fluid volume (AFV) alone may inaccurately assess fluid status.

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Area of Science:

  • Obstetrics and Gynecology
  • Fetal Medicine
  • Diagnostic Imaging

Background:

  • Amniotic fluid plays a crucial role in fetal development and well-being.
  • Accurate assessment of amniotic fluid is essential for monitoring pregnancy complications.
  • Amniotic fluid index (AFI) and amniotic fluid volume (AFV) are common sonographic methods for evaluation.

Purpose of the Study:

  • To establish normative data for amniotic fluid index (AFI) across gestational ages.
  • To compare AFI and amniotic fluid volume (AFV) measurements in normal and high-risk pregnancies.
  • To evaluate the correlation between AFI and AFV and their diagnostic accuracy.

Main Methods:

  • Calculation of AFI in 310 women (459 occasions).
  • Analysis of normative AFI data and comparison with high-risk groups.

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  • Assessment of amniotic fluid volume (AFV) via pocket measurements.

    • Main Results:

    • Normal pregnancies show a progressive increase in AFI until 32 weeks, followed by a decline.
    • Mean AFIs in abnormal gestations varied with clinical diagnoses.
    • No accurate correlation was found between AFI and AFV; AFV alone can lead to misinterpretation.

    Conclusions:

    • Amniotic fluid index (AFI) demonstrates a consistent pattern with gestational age in normal pregnancies.
    • Amniotic fluid volume (AFV) assessment alone may result in inaccurate interpretations of amniotic fluid status.
    • Clinical diagnoses influence AFI values in abnormal gestations.