Frequently asked questions
Short, direct answers. Each links to the page with the full picture.
At what age can autism be diagnosed?
Experienced clinicians can reliably diagnose autism by age 2, and evaluations can begin as early as 12–18 months when signs are clear. Autism-specific screening is recommended for all children at 18 and 24 months. There's no need — and no benefit — in waiting until school age. More: how screening works.
What is the earliest sign of autism in babies?
The best-replicated early markers: reduced response to name by 9–12 months, limited joint attention (not pointing to show, not following your point by 12 months), few warm back-and-forth smiles, no babbling by 12 months, and no gestures by 12 months. Full list: signs by age.
My toddler makes eye contact. Can he still be autistic?
Yes. Many autistic children make some eye contact, smile, and are affectionate. Autism is a pattern, not a single behavior — nothing is ruled out by eye contact alone. More: myths & facts.
Is late talking the same as autism?
No. Many late talkers aren't autistic. The key difference is nonverbal communication: a late talker who points, shows, gestures, and shares enjoyment is communicating richly without words. Late speech plus limited gestures, shared attention, or response to name is the pattern that warrants evaluation.
My child lost words he used to say. What should I do?
Any loss of language, babbling, or social skills at any age deserves a prompt evaluation — contact your child's doctor now and also request a hearing test. Regression occurs in roughly a quarter of autistic children, usually between 15 and 24 months. This is the one sign where "wait and see" is clearly the wrong answer.
Do I need a diagnosis before starting therapy?
No. In the U.S., children under 3 can get free early intervention based on delay alone — you can refer your own child, no doctor's order needed. From age 3, your school district must evaluate for free. Run services and the diagnostic evaluation in parallel. How: next steps.
What should I say to my pediatrician?
Be direct: "I'm concerned about autism. I'd like a formal developmental screening, the M-CHAT autism screening, and a referral for a comprehensive evaluation." Bring written examples and short videos. If you hear "wait and see" despite persistent concern, insist or seek a second opinion — that's consistent with pediatric guidance, not against it.
Can an online test tell me if my child is autistic?
No online tool can diagnose autism. Validated screeners like the M-CHAT-R/F (free at mchatscreen.com, ages 16–30 months) answer exactly one question: should this child have a full evaluation? Take any result to your child's doctor.
Medical disclaimer: Educational information only — not medical advice and not a diagnostic service. Consult a qualified clinician about your child.