Amniotic fluid index (AFI)
This is used as an estimate of the amniotic fluid volume, to know if there is a normal amount of amniotic fluid or if there is not enough or too much amniotic fluid.
This is measured by ultrasound and basically is the sum of all the four single deepest pockets from each quadrant.
Note: A fluid pocket may contain fetal parts or umbilical cord loops, but these are not included in the measurement.
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