7 Common Early Signs of Autism in Infants and Toddlers
There is a particular kind of worry that settles in quietly. It is not dramatic. It does not arrive all at once. It is the kind that builds slowly, in the small moments. The way your baby does not turn toward your voice. The way your toddler lines up toys instead of playing with them. The way certain sounds send them into a spiral that takes a long time to come back from.
Most parents who end up on this page are not panicking. They are paying attention. And paying attention early is one of the most powerful things a parent can do.
Autism can be identified as early as 18 months in some children, and in many cases, signs are present even earlier than that. The earlier a child receives the right support, the better the outcomes tend to be. Not because autism needs to be fixed, but because understanding how your child experiences the world means you can build an environment that actually works for them.
This post walks through seven of the most common early signs of autism in infants and toddlers. It is not a diagnostic tool. Only a qualified professional can diagnose autism. But it is a starting point for parents who want to understand what they are seeing and what to do next.
Table of Contents
What Are Some Common Early Signs of Autism in Infants and Toddlers?
Sign 1: Limited or No Eye Contact
Sign 2: Not Responding to Their Name
Sign 3: Delayed or Absent Speech and Language
Sign 4: Repetitive Movements or Behaviours
Sign 5: Difficulty With Changes in Routine
Sign 6: Unusual Sensory Responses
Sign 7: Limited Interest in Other Children or Social Play
What to Do If You Recognize These Signs
Helpful Resources to Bookmark
Final Thoughts
What Are Some Common Early Signs of Autism in Infants and Toddlers?
This is one of the most searched questions by parents who are beginning to notice something different about their child's development. And it is the right question to be asking.
According to the World Health Organization, in 2021 about 1 in 127 persons had autism, making it one of the most common neurodevelopmental conditions in the world. Yet many children are still not diagnosed until school age or later, often because the early signs were not recognised or were dismissed by well-meaning professionals.
The signs listed below are not a checklist where ticking three boxes means your child is autistic. They are patterns worth paying attention to, patterns that, if present consistently and across different settings, are worth discussing with your child's paediatrician.
Sign 1: Limited or No Eye Contact
Eye contact is one of the earliest forms of human connection. Most babies begin making meaningful eye contact from around six to eight weeks old. By three months, a baby will typically hold your gaze, smile back, and track your face as you move.
In many autistic infants and toddlers, eye contact is limited, inconsistent, or absent entirely. This does not mean the child is unaware of the people around them. Many autistic children are deeply attuned to their environment. But the natural pull toward a caregiver's eyes that most neurotypical babies show may not be there in the same way.
What to look for:
Baby rarely looks at your face during feeding or play
Toddler looks past you or through you rather than at you during conversation
Eye contact happens only briefly or seems to take effort
Child does not look toward where you are pointing
It is worth noting that some autistic children make plenty of eye contact. The absence of eye contact alone does not confirm autism. But combined with other signs, it is something to bring up with a professional.
Sign 2: Not Responding to Their Name
According to the Center for Disease Control and Prevention, by around nine months, most babies will reliably turn toward the sound of their own name. It is one of the earliest markers of social awareness and language development.
A common early sign of autism is a child who does not consistently respond when called by name. Parents often describe this as the child seeming to be in their own world. They may respond to other sounds, loud noises, music, or their favourite show, but not to a familiar voice calling their name directly.
This is important to note because it can be mistaken for a hearing issue. If you are concerned, a hearing test is a sensible first step. But if hearing is confirmed to be normal and your child still does not respond consistently to their name by twelve months, it is worth raising with your doctor.
Sign 3: Delayed or Absent Speech and Language
Speech and language development varies widely between children, and not all delays point to autism. But certain patterns of language development are more commonly associated with autism than with typical developmental variation.
These include:
No babbling by twelve months
No single words by sixteen months
No two-word phrases by twenty-four months
Loss of previously acquired language skills at any age
That last point is particularly significant. A child who was developing speech and then stops using words they previously had is showing a regression that should always be assessed promptly.
Some autistic children develop language on a typical timeline but use it in atypical ways. They may repeat phrases from television or books, a pattern called echolalia. They may speak in a very literal way, struggle with back-and-forth conversation, or use language to narrate rather than communicate with others.
According to Autism Speaks, around the world 1 in 100 children are diagnosed with autism, and communication differences are among the most consistent features across those diagnoses.
Dropped in a Maze by Sonia Chand walks through the reality of navigating communication differences and everything that comes with them in the early years. Order your copy today
Sign 4: Repetitive Movements or Behaviours
Repetitive movements, often called stimming, are one of the most recognised features of autism. These are movements or behaviours that are repeated consistently and often serve a self-regulating function for the child.
Common examples in infants and toddlers include:
Hand flapping, particularly when excited or distressed
Rocking back and forth while sitting or standing
Spinning in circles repeatedly
Toe walking
Lining up toys or objects rather than using them in play
Spinning wheels on toy cars and watching them closely rather than playing with the car itself
It is important to understand that stimming is not inherently harmful. For many autistic people, repetitive movements are a way of managing sensory input, expressing emotion, or simply finding comfort. The goal should never be to eliminate stimming. The goal is to understand what it communicates about how your child is experiencing their environment.
Sign 5: Difficulty With Changes in Routine
Many autistic children have a strong need for sameness and predictability. When routines are disrupted, even in ways that seem minor to a parent, the response can be intense and prolonged.
This might look like:
Significant distress when a usual route is changed
Meltdowns triggered by unexpected transitions, like leaving the park earlier than expected
Insistence on eating the same foods in the same order
Distress if furniture is moved or items are not in their usual place
Needing the same bedtime routine performed in exactly the same way every night
Understanding this as a neurological need rather than defiance or stubbornness changes everything about how you respond to it. A child who falls apart when the routine changes is not being difficult. They are experiencing genuine distress in a world that feels unpredictable.
This is one of the areas where the shift from autism awareness to autism acceptance makes the most practical difference in daily family life. If you have not yet read the post on autism awareness vs autism acceptance, it gives important context for understanding why the way we frame these behaviours matters so much.
Sign 6: Unusual Sensory Responses
The sensory world is experienced differently by many autistic children. Some are hypersensitive, meaning they are easily overwhelmed by sensory input that most people barely notice. Others are hyposensitive, meaning they seek out intense sensory experiences and seem to have a higher threshold for pain or discomfort.
Hypersensitive responses might include:
Covering ears at sounds that do not seem loud to others
Distress around certain textures in clothing or food
Extreme reactions to bright lights or busy visual environments
Refusing to walk on grass or sand barefoot
Hyposensitive responses might include:
Seeking out strong physical pressure, wanting to be squeezed or wrapped tightly
Appearing not to notice pain, like a fall that would make most children cry
Mouthing objects well beyond the typical age for this behaviour
Craving movement, spinning, or jumping constantly
Neither pattern is better or worse. They are simply different ways of processing the world. Once you understand your child's sensory profile, you can make adjustments that genuinely reduce their daily stress levels.
Sign 7: Limited Interest in Other Children or Social Play
Most toddlers begin showing interest in other children around the age of two. They may not play together in a fully interactive way yet, but they notice each other, imitate each other, and show curiosity about what other children are doing.
Autistic toddlers may show little interest in other children. They may prefer solitary play, seem unaware of other children in the room, or not engage in the imitative play that most toddlers naturally fall into.
Pretend play is another area worth watching. By around eighteen to twenty-four months, most children begin using objects symbolically, pretending a banana is a phone or feeding a doll. This kind of imaginative, symbolic play is often delayed or absent in autistic toddlers.
This does not mean autistic children do not want connection. Many autistic children are deeply affectionate and social in their own way. But the social instincts that develop automatically in neurotypical children may need to be taught, modelled, and supported deliberately in autistic children.
The podcast covers this topic in depth, including honest conversations about what social development really looks like for autistic children and how families can support it without forcing neurotypical behavior patterns.
Listen to the podcast here and join thousands of families navigating the same questions.
What to Do If You Recognize These Signs
If you have read through this post and several of these signs feel familiar, the most important thing you can do right now is act without waiting.
Here is a simple starting point:
Talk to your paediatrician at the next appointment: Bring specific examples of what you have been observing, written down if possible. Do not wait to be asked. Bring it up yourself.
Request a developmental screening: In many countries this is a standard part of well-child checks, but it is not always done automatically. Ask for it specifically.
Do not let anyone tell you to wait and see without a clear reason: Early intervention is consistently shown to make a meaningful difference. Waiting costs time that matters.
Start reading and learning now: Understanding autism before a formal diagnosis means you are already building the knowledge you need. The best selling autism books on this topic include titles written by autistic authors, parents, and clinicians that will give you a much fuller picture than any single blog post can.
Book a coaching session here if you want to talk through what you are seeing with someone who understands the journey from the inside.
Final Thoughts
Noticing these signs in your child does not mean something is wrong. It means you are paying close attention to someone you love deeply, and that attention is the foundation of everything good that comes next.
An autism diagnosis, if that is where this leads, is not the end of anything. It is the beginning of understanding. It is the moment when the guessing stops and the real support can begin.
The families who navigate this journey well are not the ones who had all the answers early. They are the ones who stayed curious, stayed connected, and kept showing up for their child even when the road was unclear.
That is exactly what you are already doing by being here.
Newly Diagnosed: What to Do After Your Child Gets an Autism Diagnosis
Getting an autism diagnosis for your child is one of those moments that splits life into before and after. One moment you are sitting in a doctor's office, the next you are walking out with a piece of paper that changes everything and nothing at the same time.
The questions come fast. What does this mean for my child's future? Where do we even start? Who do we call? What do we stop doing and what do we do more of? The noise inside your head can feel deafening.
This post is for that moment. It is for the parent sitting in the car park after the appointment, unsure of what the next step looks like. It is a practical, honest guide to what actually comes next, not a list of scary statistics or overwhelming medical jargon, but a real roadmap written by someone who has been exactly where you are standing right now.
Table of Contents
Let Yourself Feel It First
Understand What the Diagnosis Actually Means
Build Your Support Team
Learn About Available Therapies
Navigate School and Education Support
Take Care of Yourself Too
Connect With the Right Community
What Acceptance Actually Looks Like From Here
Final Thoughts
Let Yourself Feel It First
Before the appointments, the research, the therapy referrals, and the school meetings, there is this: permission to feel whatever you are feeling right now.
For some parents, a diagnosis brings relief. It gives a name to something they have been sensing for a long time. For others, it brings grief. Not grief for their child, but grief for the future they had imagined. Both of those responses are completely valid. So is everything in between.
The worst thing you can do in the days right after a diagnosis is bury the emotions under a mountain of action. Doing things feels productive. It feels like you are fighting for your child. And there will absolutely be a time for that. But right now, give yourself a few days to simply sit with what just happened.
Talk to your partner if you have one. Call a friend. Write it down. Cry if you need to. The parents who navigate this journey well are not the ones who skipped the hard feelings. They are the ones who moved through them.
Autism Diagnosis
Understand What the Diagnosis Actually Means
Once the initial wave settles, the next step is understanding what you have actually been told. Autism Spectrum Disorder, or ASD, is a neurodevelopmental condition that affects how a person communicates, processes information, and experiences the world around them.
The word "spectrum" is important here. Autism looks different in every single person who has it. Two children with the same diagnosis can have vastly different strengths, challenges, communication styles, and support needs. A diagnosis tells you the category. It does not tell you the full story of your child.
Some things worth understanding early:
Autism is not caused by parenting style, diet, vaccines, or anything you did or did not do
Autism is lifelong but it does not mean your child's life will be limited
Early support and the right environment make an enormous difference
Autistic people live full, meaningful, connected lives
Reading widely and from credible sources matters here. It also matters to read from autistic people themselves, not just medical literature. Their lived experience will teach you things no clinical document can.
The best selling autism books recommended in this space cover everything from early diagnosis to adult life, and many are written by autistic authors or parents who have walked this road. Start there before you start Googling at midnight.
Dropped in a Maze by Sonia Chand is one of those books. It is an honest account of navigating the autism journey without a map. Order your copy here and read it in those early weeks when everything feels uncertain.
Build Your Support Team
One of the most important things to do after a diagnosis is to build a team around your child and around your family. You are not meant to do this alone, and trying to will burn you out faster than anything else.
Your support team will likely include a mix of the following:
A developmental paediatrician or child psychiatrist who can monitor your child's development over time and adjust recommendations as your child grows.
A speech and language therapist especially if communication is an area of need. This does not only apply to children who are nonverbal. Many autistic children have language but struggle with the social use of it, and a good speech therapist works on both.
An occupational therapist who helps with sensory processing, fine motor skills, and the daily living tasks that can feel overwhelming for autistic children.
A clinical psychologist who can support your child's emotional regulation and also support you as a parent navigating complex feelings and decisions.
Your child's school or early years setting who need to know about the diagnosis so the right support can be put in place as early as possible.
Building this team takes time. Not everyone will be the right fit. It is completely acceptable to change therapists or seek second opinions. Think of yourself as the project manager of your child's care, and do not be afraid to ask questions, push back, or request different approaches.
Learn About Available Therapies
After a diagnosis, many parents are handed a list of therapy recommendations and left to figure out what they all mean. Here is a plain language breakdown of the most common ones:
Applied Behaviour Analysis (ABA): This is one of the most widely recommended and also one of the most debated therapies in the autism community. It focuses on behaviour and skill building. If it is recommended for your child, research both the evidence base and the critiques, particularly from autistic adults who have experienced it.
Speech and Language Therapy: Focuses on communication, both verbal and nonverbal, and on the social use of language.
Occupational Therapy: Addresses sensory processing, coordination, self-care skills, and daily routines.
Social Skills Groups: Structured settings where autistic children learn and practise social interaction with peers.
Play Therapy: Particularly useful for younger children, using play as a medium for communication and emotional development.
The goal of any therapy should not be to make your child appear less autistic. The goal should be to help your child communicate, connect, and navigate the world in a way that works for them. Keep that standard when evaluating any recommendation you receive.
Navigate School and Education Support
School is often where the biggest battles happen, and where the right support makes the most visible difference. Once you have a diagnosis, you have the right to request that your child's school puts formal accommodations in place.
Depending on where you live this might be called an Individual Education Plan, an Education Health and Care Plan, or a Special Educational Needs support plan. The name differs by country but the principle is the same: a documented, legally binding plan that outlines what support your child will receive in school.
Some things to push for when working with schools:
A named key worker or point of contact for your child
Sensory accommodations such as a quiet space or movement breaks
Clear and consistent communication between school and home
Staff who have received autism-specific training
Flexibility in how your child demonstrates learning, not every child does well in written tests
Do not wait for the school to come to you. Request a meeting as soon as the diagnosis is confirmed. Come prepared with what you know about your child's needs. You are the expert on your child. The school is the expert on education. The best outcomes happen when both of those things are respected.
To understand the broader context of autism support and what this month means for families like yours, the World Autism Awareness Day guide covers the global conversation around autism rights and inclusion happening right now.
Take Care of Yourself Too
This section gets skipped far too often and it is one of the most important ones on this list.
Parenting an autistic child can be joyful, profound, and deeply rewarding. It can also be exhausting, isolating, and emotionally complex in ways that are hard to explain to people who have not lived it. Both of those things are true at the same time.
Caregiver burnout is real. It looks like chronic exhaustion, emotional numbness, resentment, anxiety, and the feeling that you have completely lost yourself in your child's needs. It is not a sign of weakness or bad parenting. It is what happens when someone gives without ever refilling.
Some things that genuinely help:
Finding one thing each week that is entirely for you
Connecting with other autism parents who actually get it
Being honest with your partner, family, or close friends about what you need
Getting professional support if the anxiety or grief feels unmanageable
Accepting help when it is offered instead of insisting you are fine
The podcast is a space built for exactly this, for the conversations that are hard to have anywhere else, the ones about the grief and the guilt and the love and the impossible decisions. Thousands of families tune in every week because it helps to know you are not alone in this.
Community
Connect With the Right Community
The autism community is large, passionate, and full of people who will become some of the most important relationships in your life. Finding your corner of it early makes a significant difference.
Look for:
Parent support groups both local and online. Facebook groups, in-person meetups, and charity-run workshops can connect you with parents at every stage of the journey.
Autistic-led spaces where autistic adults share their experiences. Following autistic writers, advocates, and content creators gives you a perspective that no amount of clinical reading can replace.
Family organisations in your country that offer helplines, resources, and guidance on navigating diagnosis and support systems.
One thing to be mindful of: not all autism communities are created equal. Some spaces are led primarily by parents and focus heavily on challenges and deficits. Others centre autistic voices and focus on acceptance and empowerment. Seek out the latter. It will shape how you see your child and how your child eventually sees themselves.
Also, take a look at the discussion around autism awareness vs autism acceptance to understand why the language and framing you choose from the very beginning matters more than most people realise.
What Acceptance Actually Looks Like From Here
Here is something that takes most parents a while to arrive at: the goal is not to minimise your child's autism. The goal is to understand it deeply enough that you can build a life around it that genuinely works.
That means letting go of comparisons with neurotypical children. It means measuring your child's progress against their own journey, not against a developmental chart designed for a different kind of brain. It means celebrating the wins that other people might not even notice, the first time your child made eye contact with a stranger, the morning they got through a transition without a meltdown, the day they told you about something that made them happy.
It also means advocating loudly and consistently for a world that makes room for your child exactly as they are. In schools, in public spaces, in family gatherings, in every environment your child moves through.
That journey from diagnosis to acceptance is not linear and it is not quick. But it is absolutely possible. Sonia Chand's book Dropped in a Maze walks through exactly that journey, the confusion, the wrong turns, the moments of clarity, and the hard-won understanding that came from living it rather than just reading about it.
Order Dropped in a Maze today. It is the book so many parents wish they had in those first weeks after diagnosis.
Final Thoughts
A diagnosis is not a ceiling. It is a starting point.
It is the moment when the guessing stops and the understanding begins. It is the moment when the right support can finally be put in place, because now there is a name for what your child needs and a roadmap, however imperfect, for how to get there.
The road ahead will have hard days. There will be appointments that go nowhere and professionals who do not listen and systems that were not designed with your child in mind. There will also be breakthroughs, unexpected moments of connection, and a depth of love that is difficult to put into words.
You are not starting this journey because something is wrong with your child. You are starting it because your child deserves to be understood, supported, and celebrated for exactly who they are.
That is worth everything.
To find out more about global autism support and how to mark April 2nd this year, visit the full guide on World Autism Awareness Day.