My baby is not listening I have tested all thing results is positive what I do

A. Okay so there are two things in your query your child is not listening or your child is not responding because there are two different theories associated with these two things that I am saying because if your child is not listening and all the tests are normal that basically your child is not responding to anything yet that you are saying that can be associated with delayed growth in terms of understanding and growth of your child mentally so you should consult a child psychologist once