For many parents, the toddler years are filled with exciting milestones, such as first words, early play, growing independence, and new social interactions. But sometimes, families may notice developmental differences that raise questions.

A child may not respond to their name. They may avoid eye contact, have delayed speech, prefer playing alone, repeat certain movements, or become very upset with changes in routine.

Important: One sign alone does not automatically mean a child has autism. However, when several signs appear together or continue over time, it may be helpful to speak with a pediatrician or developmental specialist.

Autism Spectrum Disorder, also called ASD, is a developmental condition that can affect communication, social interaction, behavior, learning, movement, and sensory processing.

Key point for families: Early recognition does not mean labeling a child. It means understanding the child’s needs and helping them access support as early as possible.

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Common Early Signs of Autism in Toddlers

Autism does not look the same in every child. Some signs may be clear, while others may be subtle. Parents often notice differences in communication, social interaction, play, repetitive behaviors, or sensory responses.

1. Limited Eye Contact

Some toddlers with autism may have reduced or inconsistent eye contact.

Parents may notice that their child:

• Does not look at them often during play
• Looks away when someone speaks
• Does not use eye contact to ask for help or share excitement
• Does not look back and forth between a toy and a parent

Example: A parent points to a toy and says, “Look,” but the child continues focusing on the toy without looking back at the parent to share the moment.

Parent note: Limited eye contact alone does not confirm autism, but it can be important when combined with other social or communication concerns.

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2. Delayed Speech or Limited Communication

Speech delay is one of the most common reasons parents seek guidance.

Possible signs include:

• Limited babbling by around 12 months
• Few or no spoken words by 16 to 18 months
• No meaningful two-word phrases by around 24 months
• Difficulty using words, gestures, or sounds to ask for help
• Repeating words or phrases without using them clearly to communicate
• Losing words or communication skills the child previously had

Important: Communication is more than talking. Gestures such as pointing, waving, showing objects, reaching, and nodding are also important communication skills.

Example: A toddler wants juice but does not point, say “juice,” bring the cup, or look at the parent. Instead, the child may cry, pull the parent’s hand, or wait for the parent to guess.

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3. Limited Response to Name

Some parents first become concerned when their child does not consistently respond to their name.

Parents may notice that their child:

• Does not turn when called
• Responds sometimes but not consistently
• Seems to ignore people
• Responds more quickly to favorite sounds, music, or videos than to people

Example: A parent calls the child’s name several times from nearby, but the child does not turn around. However, the child reacts immediately when a favorite cartoon song begins.

Parent tip: It may be helpful to ask the pediatrician about both a hearing evaluation and developmental screening.

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4. Reduced Social Interaction

Many toddlers naturally begin to show interest in people through smiles, gestures, imitation, and social games. A toddler with autism may show less interest in social interaction or may interact in a different way.

Possible signs include:

• Limited smiling back at others
• Limited interest in peekaboo or simple social games
• Rarely bringing toys to show parents
• Limited imitation of clapping, waving, or facial expressions
• Preference for playing alone
• Difficulty joining play with other children

Key point: Many autistic children enjoy love, affection, and relationships. They may simply communicate or connect differently.

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5. Limited Pretend Play

Pretend play is an important developmental skill. It may include feeding a doll, pretending to talk on a phone, making animal sounds, or using toys in creative ways.

Possible concerns include:

• Limited pretend play
• Playing with toys in the same way repeatedly
• Focusing on parts of toys, such as wheels
• Lining up toys instead of using them flexibly
• Difficulty copying simple play actions

Example: Instead of pretending to drive a toy car, a child may repeatedly spin the wheels, line up cars by color, or watch the wheels closely for a long time.

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6. Repetitive Behaviors or Movements

Repetitive behaviors are common in autism and may help a child manage excitement, stress, or sensory input.

Examples may include:

• Hand flapping
• Rocking
• Spinning
• Repeating sounds or phrases
• Watching spinning objects
• Opening and closing doors repeatedly
• Lining up toys
• Repeating the same play routine

Important: The goal is not always to stop every repetitive behavior. Support is most important when a behavior affects safety, learning, communication, or daily routines.

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7. Sensory Sensitivities or Sensory Seeking

Many children with autism experience sensory differences. They may be sensitive to certain sounds, textures, lights, smells, movement, or touch.

A child may be sensitive to:

• Loud noises
• Haircuts
• Toothbrushing
• Clothing tags
• Certain food textures
• Bright lights
• Crowded places

A child may also seek sensory input by:

• Jumping
• Spinning
• Crashing into cushions
• Touching surfaces repeatedly
• Watching lights or moving objects

Example: A toddler may cry when a blender turns on, refuse certain clothing because of texture, or become overwhelmed in a busy store.

Key point: What may look like “bad behavior” can sometimes be a sign that the child is overwhelmed.

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8. Difficulty With Changes in Routine

Many toddlers like routines, but some children with autism may have strong distress when routines change.

Examples include:

• Crying when a route changes
• Becoming upset if a favorite cup is unavailable
• Difficulty moving from one activity to another
• Strong reactions when toys are moved
• Distress when bedtime routines change

Parent tip: Predictability can help. Visual schedules, transition warnings, and consistent routines may make daily activities easier.

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Autism Signs by Age

Possible Signs Around 12 Months

Parents may notice:

• Limited babbling
• Limited pointing or waving
• Limited response to name
• Reduced eye contact
• Limited social smiling
• Limited interest in interactive games

Possible Signs Around 18 Months

Parents may notice:

• Few spoken words
• Limited pretend play
• Reduced imitation
• Limited gestures
• Repetitive movements
• Strong interest in certain objects
• Difficulty gaining attention appropriately

Possible Signs Around 24 Months

Parents may notice:

• No meaningful two-word phrases
• Difficulty playing with peers
• Limited social communication
• Strong sensory sensitivities
• Intense reactions to routine changes
• Repetitive play patterns
• Loss of previously learned words or social skills

Important: The American Academy of Pediatrics recommends autism-specific screening at 18 and 24 months, along with regular developmental surveillance.

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Speech Delay vs Autism: What Is the Difference?

Speech delay and autism can overlap, but they are not the same.

A child with speech delay may want to communicate socially but have difficulty using enough words or speaking clearly.

A child with autism may have speech delay along with differences in:

• Eye contact
• Gestures
• Response to name
• Social interaction
• Pretend play
• Sensory responses
• Repetitive behaviors

Example: A child with speech delay may point to a toy, look at the parent, make sounds, and try to share interest even if they cannot say the word.

A child with autism may have fewer gestures, reduced shared attention, limited pretend play, or repetitive behaviors in addition to delayed speech.

Key point: A professional evaluation can help families understand what kind of support their child may need.

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When Should Parents Seek an Evaluation?

Parents should talk with their child’s pediatrician if they notice:

• Speech delay
• Loss of language or social skills
• Limited response to name
• Limited eye contact
• Limited gestures
• Limited pretend play
• Repetitive behaviors
• Sensory sensitivities
• Difficulty with transitions
• Concerns about social interaction

Important: Parents do not need to wait until concerns become severe. Early questions deserve early support.

The CDC states that all children should be screened specifically for autism during well-child visits at 18 and 24 months. Research also shows that autism can sometimes be detected at 18 months or younger, and by age 2, a diagnosis by an experienced professional can be considered reliable.

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Why Early Intervention Matters

Early intervention can help children build important skills during a key period of development.

Support may focus on:

• Communication
• Social interaction
• Play skills
• Daily routines
• Emotional regulation
• Safety awareness
• Feeding or sensory challenges
• Parent training and family support

Key point: Early intervention is not about changing who a child is. It is about helping the child build meaningful skills that support daily life, learning, independence, and communication.

Therapies may include:

• ABA Therapy
• Speech Therapy
• Occupational Therapy
• Developmental therapy
• Family support and parent guidance

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What Parents Can Do at Home

Parents can support development through simple daily routines.

Helpful strategies include:

• Get face-to-face during play
• Use simple words and short phrases
• Follow your child’s interests
• Pause and wait for your child to communicate
• Celebrate communication attempts
• Use gestures, pointing, and visual support
• Read simple books together
• Give warnings before transitions
• Reduce overwhelming sensory input when possible

Example: If your child reaches for a snack, pause and model the word “snack” or “more.” If your child points, looks, makes a sound, or uses a word, respond warmly. This teaches that communication is powerful.

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What Parents Should Avoid

Families should avoid blaming themselves or waiting too long because they hope the child will “grow out of it.”

Try to avoid:

• Ignoring repeated developmental concerns
• Comparing your child harshly to other children
• Assuming speech delay is always temporary
• Waiting years before asking for help
• Using punishment for sensory-related distress
• Thinking that asking for an evaluation means something is wrong with your child

Important: Seeking support is not a sign of failure. It is a sign of advocacy.

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Frequently Asked Questions

Can autism be diagnosed before age 2?

Yes. Some children show signs of autism before age 2. The CDC notes that autism can sometimes be detected at 18 months or younger, and by age 2, a diagnosis by an experienced professional can be considered reliable.

Does speech delay always mean autism?

No. Speech delay can happen for many reasons. However, speech delay combined with limited gestures, reduced social interaction, repetitive behaviors, or sensory concerns may indicate the need for autism screening or developmental evaluation.

What should I do if I think my toddler may have autism?

Start by talking with your child’s pediatrician. Ask about developmental screening, autism-specific screening, a hearing evaluation, and early intervention options.

Should I wait for a diagnosis before starting support?

Not always. The American Academy of Pediatrics recommends that children be referred for intervention when developmental delays are identified and not wait for an autism diagnostic evaluation before beginning support.

Can ABA therapy help toddlers with autism?

ABA therapy can help toddlers build communication, social, play, daily living, and behavior regulation skills when the program is individualized, ethical, family-centered, and supervised by qualified professionals.

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How Autism Care Therapy (ACT) Can Help

At Autism Care Therapy (ACT), we understand how emotional and confusing it can feel when parents first notice developmental differences in their child.

Our team provides compassionate, individualized support for children with autism and developmental needs through:

• ABA Therapy
• Speech Therapy
• Occupational Therapy
• Family-centered care
• Developmental support
• Parent guidance
• Skill-building programs

ACT therapists work with families to help children build meaningful skills in communication, social interaction, play, daily routines, emotional regulation, and independence.

If you are concerned about your child’s development, ACT can help guide your family through the next steps with care, professionalism, and support.

 

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Media Resources

CDC Learn the Signs. Act Early. Videos
https://www.cdc.gov/act-early/resources/videos.html

 

CDC’s Free Tools to Track Child Development
https://www.youtube.com/watch?v=EuVPhJnFxMg

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Sources and References

Centers for Disease Control and Prevention. Signs and Symptoms of Autism Spectrum Disorder.
https://www.cdc.gov/autism/signs-symptoms/index.html

Centers for Disease Control and Prevention. Clinical Screening for Autism Spectrum Disorder.
https://www.cdc.gov/autism/hcp/diagnosis/screening.html

American Academy of Pediatrics. Autism Spectrum Disorder Recommendations.
https://www.aap.org/en/patient-care/autism/

Behavior Analyst Certification Board. About Behavior Analysis and Treatment of Autism and Other Developmental Disabilities.
https://www.bacb.com/about-behavior-analysis/treatment-of-autism-and-other-developmental-disabilities/