AFI, or Amniotic Fluid Index, in pregnancy is a method used to measure the amount of amniotic fluid surrounding the fetus.
Understanding Amniotic Fluid Index (AFI)
The Amniotic Fluid Index (AFI) is a quantitative assessment of amniotic fluid volume during pregnancy. Doctors measure the depth of amniotic fluid in four quadrants of the uterus and sum these measurements to obtain the AFI.
How is AFI Measured?
- The uterus is divided into four quadrants.
- The deepest pocket of amniotic fluid is measured in each quadrant using ultrasound.
- The measurements from all four quadrants are added together to get the AFI.
What Does the AFI Indicate?
The AFI value helps doctors determine if there is too much or too little amniotic fluid. According to the provided reference:
- Normal AFI: Generally falls between 5 and 25 centimeters, though ranges can vary.
- Oligohydramnios: An AFI less than 5 centimeters indicates low amniotic fluid.
- Polyhydramnios: A high AFI may indicate excessive amniotic fluid (polyhydramnios).
Why is AFI Important?
AFI is important because amniotic fluid plays a vital role in fetal development. Abnormal AFI values (either too high or too low) can indicate potential problems and may require further evaluation and management.
