1.Your child does not respond to their name by 12 months of age.
Your child does not point at objects to show interest (like an airplane by 14 months)
2.Your child does not play "pretend" games by 18 months.
3.Your child avoids eye contact and wants to be alone.
4.Your child has trouble understanding other people's feelings.
5.Your child has delayed speech and language skills
6.Your child repeats words or phrases over and over (Echolalia).
7.Your child gets upset by minor changes
8.Your child has obsessive interests.
9.Your child flaps their hands, rock their body, or spin in circles.
10.Your child has unusual reactions to the way things sound, smell, taste, look, or feel
11.Repeat words just heard or words heard days or weeks earlier-called echolalia (pronounced ek-o-lay-le-a);
12.Talk with little expression or use a sing-song voice;
13.use tantrums to tell you what he does or does not want