Your course of action will depend on whether your AFI is too low or high for your current gestation.
If you are told during a routine sonogram that you have excess fluid in the uterus, you will be offered close monitoring of both the baby and you. You may even have fluid removed via a syringe.
If you have levels on the lower end of the scale, you may be required to stay in the hospital to receive hydration, amniotic infusions, etc.
If you go into labor and have known abnormal AFI, be prepared that you may be asked to go into the hospital immediately.