The amniotic fluid index (AFI) is an estimate of the amniotic fluid volume in a fetus. It is measured by adding the values of individual amniotic pocket depths (in cm's) for each of the four quadrants. It is part of the fetal biophysical profile.
The normal range for amniotic fluid volumes varies with gestational age. As a rule of thumb :
- 1. Magann EF, Sanderson M, Martin JN et-al. The amniotic fluid index, single deepest pocket, and two-diameter pocket in normal human pregnancy. Am. J. Obstet. Gynecol. 2000;182 (6): 1581-8. doi:10.1067/mob.2000.107325 - Pubmed citation
- 2. Hallak M, Kirshon B, Smith EO et-al. Amniotic fluid index. Gestational age-specific values for normal human pregnancy. J Reprod Med. 1993;38 (11): 853-6. - Pubmed citation
- 3. Porter TF, Dildy GA, Blanchard JR et-al. Normal values for amniotic fluid index during uncomplicated twin pregnancy. Obstet Gynecol. 1996;87 (5 Pt 1): 699-702. - Pubmed citation
Synonyms & Alternative Spellings
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|Amniotic fluid index (AFI)||✗|