Amniotic Fluid Index

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Amniotic Fluid Index (AFI) is a measure of the amount of amniotic fluid and is an index for the fetal wellbeing. It is a part of the Biophysical profile.


AFI is the score given to the amount of amniotic fluid (by adding up centimeters of depth of four pockets of fluid) seen on pregnant uterus by ultrasound. An AFI < 5-6 is considered as Oligohydramnios and an AFI > 18-22 is considered as Polyhydramnios.