Hi, Welcome to HCM, I am Dr. Das
AFI means how much amniotic fluid
is present in uterus
Now, for diagnosing Polyhydramnios
( increased amount of amniotic fluid) AFI must be >25.
So, you have marginally raised AFI.
AFI may be increased due to many causes like maternal diabetes
, fetal anomaly,placental anomaly, even twins.
As Doctor did not suggest any fetal anomaly, i can assume fetal and placental anomalies are excluded.
As yourfasting and PP are normal there is lower chance of having diabetes.
But I suggest to go for Oral Glucose Tolerance test
which will indicate presence of any impaired glucose tolerance