Symptoms may not show up until 24 months or later. Some children with an ASD seem to develop normally until around 18 to 24 months of age and then they stop gaining new skills, or they lose the skills they once had. Studies have shown that one third to half of parents of children with an ASD noticed a problem before their child’s first birthday, and nearly 80%–90% saw problems by 24 months of age.
Some Symptoms Include:
Not respond to their name by 12 months of age
Avoid eye contact and want to be alone
Have delayed speech and language skills
Repeat words or phrases over and over (echolalia)
Get upset by minor changes
Have obsessive interests
Flap their hands, rock their body, or spin in circles
Have unusual reactions to the way things sound, smell, taste, look, or feel
Center for Disease control and prevention, (2015) Signs and Symptoms.Retrieved April 25, 2017, from https://www.cdc.gov/ncbddd/autism/signs.html