Early Signs of Autism in Toddlers, by Age

You said their name four times while they lined up the blocks. Nothing. Then the fridge door opened in the next room and they turned instantly.

That is usually the moment. Not a checklist and not a doctor's appointment. One small ordinary contradiction you cannot unsee. Which is how you ended up at eleven at night reading about early signs of autism in toddlers, on a page that lists twenty things with no ages attached, so the parent of a fourteen-month-old is reading signs that only make sense in a three-year-old.

This one is organised by age. Read your child's band and the one just before it. Skip the rest. A sign your child has not had the chance to show yet tells you nothing.

What are the early signs of autism in toddlers?

The earliest signs are not about talking. They are about how a child shares attention with you: whether they respond to their name, whether they point at things to show you rather than to get you to fetch something, whether they follow your point across the room, and whether your interactions have a back-and-forth rhythm.

Speech delay is the sign parents notice first and the one clinicians weight least on its own, because plenty of late talkers are not autistic and plenty of autistic children talk on time. The social-attention signs above appear earlier, carry more weight, and are what a developmental clinician asks about in the first ten minutes.

The four that carry the most weight

Sign	Usually appears by	What to look for
Responds to their name	Around 12 months	Turns to a familiar voice with no tap on the shoulder
Points to show you	12 to 15 months	Points at a plane, then checks your face
Follows your point	Around 12 to 15 months	Looks at the dog, not at your finger
Back-and-forth play	From around 9 months	Peekaboo, a ball rolled and rolled back, turns

Response to name — the comparison that matters is not you against silence. It is you against the fridge door.

Pointing to show, not to get — leading you to a cupboard is requesting. Pointing at a plane and then turning to your face is sharing. The second one is the one clinicians weight.

None of these is a diagnosis. A child can miss all four and not be autistic; a child can do all four and be autistic. They matter because they are what clinicians watch for, so noticing early puts you at the right door sooner.

9 to 12 months

Most autistic children are not identifiable at nine months. Some are, and these are the things to watch:

Rarely looks at your face during play, even when something surprising happens

Little or no back-and-forth babbling, where you say something and they volley it back

No babbling at all by 12 months, and no gestures like waving or reaching

At this age what matters is the absence of shared social behaviour, not the presence of unusual behaviour.

12 to 18 months

At the park, another toddler points at a plane and then twists round to make sure the adult beside them saw it too. Both of them laugh. You realise you cannot remember your own child ever doing that.

Does not point at things to share interest by around 15 months

Your point goes unfollowed: you gesture at the dog, and they look at your hand, or at nothing

Nothing gets carried over to you. No leaf, no toy, no bit of fluff

Their name works some days and not others, with no pattern to it

No single words by 16 to 18 months, or words appeared and then stopped

Pretend play has not started: no feeding the teddy, no cup to a doll's mouth

Very strong reaction to specific sounds, textures, or clothing seams

More interested in parts of toys than the whole toy: spinning one wheel rather than pushing the car

18 to 24 months

If a routine check-up catches anything, it catches it here. The M-CHAT-R screening is given at the 18 and 24 month visits, and a flagged result is one of the most common reasons a parent starts reading at midnight.

Fewer than about fifteen or twenty words at 18 months, or fewer than fifty at 24 months. ASHA's communication developmental milestones set out the expected range

No two-word combinations by 24 months ("more juice", "daddy shoe")

Does not imitate, so no copying you sweeping, stirring, brushing hair

Does not respond to a simple instruction without gestures

Repeats phrases from shows or from you rather than making new sentences

Plays alongside other children with no interest in what they are doing

Distress at small changes to routine, out of proportion to the change

2 to 3 years

The signs shift now, from what is missing to how your child engages.

Conversation goes one way. They tell you about the topic at length, in detail, with real pleasure, and a question back does not land. Pretend play involving another person is hard, though solo play may be elaborate and rich. Interests get deep, narrow, genuinely impressive, and they dominate everything else. Meltdowns attach to sensory input and to transitions rather than to being told no.

Listen to how the words sound, not just how many there are. Speech that carries an unusual melody, or that arrives sounding like a recording of an adult or a cartoon, is a sign in its own right. So is eye contact that is fleeting, or held in a way that seems to cost something.

Autistic children at this age are often described as being in their own world. Resist that framing. Most are extremely present. They are just not organising their attention around other people the way the room expects.

What is not a sign

Half the panic online is about things that are entirely ordinary. Ignore these unless they come with the signs above:

Toe-walking on its own — common in typical toddlers, worth mentioning at a check-up, not a red flag by itself.

Spinning, jumping, flapping when excited — every toddler does some version of this.

Lining up cars — ordering things is a normal stage of play. What matters is what happens when you join in: whether your child brings you into it, or whether your arrival is an interruption.

Being shy or slow to warm up — a wary child who checks your face is doing the social thing autism affects.

Not talking at 18 months in a child who points, shows, follows your gaze and shares jokes — far more likely a language delay. ASHA has a plain guide in [late blooming or language problem](https://www.asha.org/public/speech/development/late-blooming-or-language-problem/).

Three checks you can do this week

Run each of these when your child is calm and off a screen. Several times, across different days.

1. The name check — stand out of your child's eyeline while they play with something mildly interesting. Say their name once, in your normal voice. Wait five seconds. Note what happened: full turn, brief glance, nothing. Four trials over a week tell you far more than one.

2. The point check — sit beside your child and point at something across the room they are not already looking at, and say "look". Do they track your arm to the thing, look at your hand, or carry on as if you said nothing?

3. The interruption check — while they are happily playing, sit down and join in without taking over. Push the car back. Add a block. Wait. Note whether you get looked at, smiled at, handed something, or ignored.

Write down what you see, with dates. It is the most useful thing you can hand a clinician, and it turns a nine-month wait into nine months of evidence. More on structuring that in what to do while waiting for an autism assessment.

If your child lost skills, move faster

Words, gestures, or social behaviour that were reliably there and are now gone. Regression is the one pattern that should shorten your timeline. It does not always mean autism, and the other causes are worth ruling out quickly. Ask for a referral this week rather than at the next visit, and say the word "regression" out loud. It changes the urgency of the response you get.

What to do with what you have noticed

Take the notes to your paediatrician and ask, in these words: "I would like a developmental screening and a referral for a full evaluation." Ask for a hearing test at the same time. Hearing loss mimics several of these signs and is fast to rule out.

If you get "let's wait and see", say one more thing out loud: "I would like my concern and your decision not to refer noted in the record." That changes the calculus in the room more than any argument will, and it costs nothing.

Then start the free routes anyway, without waiting for anyone's permission. Under three, that is your state's Early Intervention programme. Three and over, it is your school district. Neither needs a diagnosis, a referral, or the paediatrician's agreement, and neither charges you. Communication support helps a child whether the answer turns out to be autism, a language disorder, or nothing at all. ASHA's autism practice portal covers what a speech-language evaluation looks at here.

FAQ

At what age do autism signs appear?

Differences in social attention can sometimes be seen from around 9 to 12 months, but most children who are later identified as autistic show clearer signs between 12 and 24 months. Some are not identified until school age or later, when social demands outgrow their strategies. That is most common in children with strong language, and in girls.

My child makes eye contact, so it can't be autism, right?

It can. The idea that autistic children never make eye contact is the most persistent myth here. Plenty look at faces, some intensely. What clinicians watch is how it is used: woven into sharing something, or happening separately from the interaction.

What actually happens at an autism evaluation?

Usually a few hours across one or two sessions: a structured play-based observation, a long developmental history taken from you, and often speech-language input alongside. You are in the room for most of it, and the dated notes you bring carry real weight. That is the whole argument of what to do while waiting for an autism assessment.

My child is talking but I still feel something is off. Am I overreacting?

Probably not. Parents notice the pattern long before they can name it, and speaking children are the group most often missed. Bring observations, not the worry: "they talk constantly but do not answer questions" gets a better response than "something is wrong".