Development

Early Signs of Autism in Children: When to Seek Evaluation

By Dr Soubhagya Khare11 September 20266 min read

Noticing something different about how your child interacts, communicates, or plays can be worrying, and it's natural to want quick answers. This article explains what autism spectrum disorder actually is, what early signs look like in context, and — just as importantly — what a single sign does and doesn't mean.

What autism is

Autism spectrum disorder is a condition — not a disease — that affects how a child learns social interaction, social communication, and language, alongside a tendency toward repetitive behaviours and restricted or intense interests. It's called a "spectrum" because it looks different in every child, ranging widely in how it presents and how much support a child needs. It is a neurodevelopmental condition, not a mental illness, and not something caused by anything a parent did. It's one of several possibilities worth considering alongside general Developmental Milestones and Speech Delay, since these areas often overlap.

Social communication signs to watch for

No single behaviour on its own indicates autism, and the ages below are developmental clues rather than hard diagnostic cutoffs — every child develops at their own pace, and these signs matter far more as a pattern, especially when several appear together:

Not responding to their own name by around their first birthday (most children respond by 8–9 months)
Reduced eye contact — though it's worth being cautious here: eye contact varies naturally between children and cultures, and this is one clue among several, not a standalone marker
Not pointing to show interest, or not following someone else's point, by around 14–15 months
Preferring to lead an adult's hand to what they want, rather than pointing or using words
Limited interest in interactive games like peekaboo by the expected age
Little interest in other children, or difficulty engaging in shared play

Repetitive behaviours and restricted interests

Some repetitive behaviour and routine-seeking is genuinely normal in young children and usually fades with age. It's worth a closer look when it's persistent, intense, and paired with the social-communication signs above — for example:

Lining up toys or objects repeatedly
Spinning objects, or fixation on parts of objects (like wheels) rather than the whole toy
Hand-flapping or other repetitive movements
Strong insistence on sameness or routine, with distress at small changes

Regression: an important reason to seek prompt evaluation

Losing previously acquired skills — words a child used to say, social responses they used to show — at any age, but particularly between about 15 and 30 months, is always worth taking seriously and should prompt a timely evaluation rather than a "wait and see" approach. This kind of regression is sometimes associated with autism, but it isn't specific to it — regression can also occur with hearing loss, other developmental or neurological conditions, or, less commonly, be a sign of an underlying medical issue that needs its own evaluation. This is exactly why regression of this kind needs a proper assessment rather than an assumption either way. A hearing check is an important part of that evaluation, since some causes of hearing loss can also affect language development.

Vaccines do not cause autism

This has been extensively studied, and the conclusion is clear: childhood vaccination has no role in causing autism. Delaying or skipping vaccines doesn't protect against autism, and it does leave your child vulnerable to genuinely serious, vaccine-preventable diseases like measles, which remain a real risk. If you have concerns about a specific vaccine, it's entirely reasonable to discuss the benefits and risks with your pediatrician — but this should be a conversation, not a reason to delay vaccination based on this particular concern.

Screening is not the same as diagnosis

Tools like the M-CHAT-R/F (a structured parent questionnaire used at routine check-ups, typically around 18–24 months) are screening tools — they identify children who would benefit from a closer look, not children who definitely have autism. A "positive" screen means further evaluation is worthwhile, not that a diagnosis is confirmed. A full diagnostic evaluation is a more detailed process, usually done by a developmental pediatrician or a similarly trained specialist, looking at your child's full developmental history and direct observation over time.

Importantly, a confirmed diagnosis isn't required before starting supportive intervention — if a screening or clinical assessment raises genuine concerns, beginning appropriate support early is generally more useful than waiting for a final diagnostic label, since earlier support tends to lead to better outcomes regardless of exactly when a formal diagnosis is reached.

Hearing matters too

If your child doesn't respond to their name or to sounds generally, a formal hearing test is important alongside any developmental or autism-specific screening — hearing loss can look similar to, or occur alongside, developmental and communication concerns, and it's straightforward to check.

What to do if you have concerns

Talk to your pediatrician about what you've noticed — specific examples help more than a general sense that "something's off"
Ask directly for a developmental screening or referral if your concern persists, rather than assuming it will resolve on its own
Be cautious of unverified or unlicensed "specialists" — ask about qualifications, certification, and a written plan for any intervention

Dr Khare has a special interest in developmental pediatrics and can help guide initial assessment and next steps — see our Developmental Pediatrics page and Developmental and Behavioural Concerns service page.

On treatment and outlook

Autism isn't "cured" by medication — the core features aren't reversed by drugs, though medication sometimes helps manage co-occurring difficulties like significant anxiety or hyperactivity. The more consistently helpful approaches are structured, evidence-based therapies (speech and language therapy, occupational therapy, structured behavioural approaches) tailored to the child. Early identification can help children access appropriate developmental and educational support sooner.

Frequently asked questions

My child doesn't make much eye contact — does that mean autism? Not on its own. Eye contact varies between children, and reduced eye contact alone, without other signs, isn't a reliable indicator. It's one piece of a bigger picture your pediatrician will look at, and pushing a child hard to maintain eye contact can create more anxiety than benefit.

Do vaccines cause autism? No. This has been thoroughly researched, and vaccination has no role in causing autism. Delaying vaccines for this reason isn't supported by evidence and leaves your child at risk from preventable diseases.

If the screening test is positive, does that mean my child has autism? No. A positive screen means a fuller evaluation is worthwhile — it identifies children who would benefit from a closer look, not a confirmed diagnosis.