Signs of autism by age.
Every child develops on their own timeline. Still, some patterns are worth a closer look. This guide covers signs parents often notice at different ages, and what to do next.
This guide is general information, not medical advice. Only a qualified professional can evaluate or diagnose a child.
Babies (around 6 to 12 months)
- Rarely makes eye contact or smiles back
- Does not respond much to their name
- Little babbling or back-and-forth sounds
- Few gestures, like reaching to be picked up
Toddlers (around 12 to 36 months)
- Does not point to show you things
- Few or no words, or loses words they used to say
- Plays with toys the same way over and over, like lining them up
- Strong reactions to sounds, textures, or changes in routine
- Seems more interested in objects than in people
Pediatricians commonly screen for autism at the 18 and 24 month well visits. You can ask about screening at any visit.
Preschool and school age
- Trouble with back-and-forth conversation
- Hard time making or keeping friends
- Very focused, intense interests
- Repeats words, phrases, or movements
- Big distress over small changes
One sign is not a diagnosis
Many children show one or two of these things and are not autistic. What matters is the overall pattern, and whether it gets in the way of daily life.
What to do next
Write down what you notice and when. Bring those notes to your pediatrician. They can screen your child and refer you to a specialist for a full evaluation if needed.
If your child is diagnosed, ABA therapy is one option. Here is what a first assessment involves.