Early Signs of Autism in Toddlers: When to Start ABA Therapy

Posted on: September 24, 2025 | Category: Autism Research

Understanding the early signs of autism in toddlers is an important first step. Just as important is knowing when to start ABA therapy—an evidence-based intervention proven to help children with autism develop essential skills.

As parents, we watch every milestone with excitement—from a baby’s first smile to those first wobbly steps. But when certain milestones are delayed or when a child develops unusual behaviors, it’s natural to wonder: Is this typical, or could it be autism?

At our autism therapy center, we provide compassionate ABA therapy for children between the ages of 18 months through 18 years, supporting families at every stage of development.

 

Recognizing Early Signs of Autism in Toddlers

Autism spectrum disorder (ASD) shows up differently in every child, but there are common signs parents may notice in toddlers. According to Autism Speaks, “Some children show early signs of autism within the first 12 months of life. In others, autism signs may not show up until 24 months of age or later.”

Here are some of the most common early signs of autism in toddlers:

• Limited eye contact or lack of shared attention (not pointing to show interest)
• Delayed speech or not using gestures like waving or nodding
• Lack of response to their name
• Repetitive movements such as rocking, hand-flapping, or spinning objects
• Difficulty with pretend play or interacting with other children
• Strong reliance on routines or distress when routines change
• Intense focus on specific toys or topics

Not all toddlers with these behaviors will be diagnosed with autism. However, noticing these patterns is reason enough to seek an evaluation.

 

Why Early Autism Intervention for Toddlers Makes a Difference

When families ask about the early signs of autism in toddlers: when to start ABA therapy, the answer is straightforward—the earlier, the better.

Research has consistently shown that children who begin ABA therapy early—sometimes as young as 18 months—make the most significant progress. That’s because during these early years, a child’s brain is rapidly developing, and interventions are more impactful.

Early ABA therapy can help your toddler:

• Develop communication and language skills
• Improve social engagement and play abilities
• Reduce challenging behaviors while promoting positive ones
• Strengthen learning and problem-solving skills
• Prepare for preschool and beyond with school-readiness tools

Still, ABA therapy benefits children of all ages. At our autism therapy center, we provide support to children up to age 18 and see progress with programs tailored to their unique developmental stage and goals.

 

How ABA Therapy Works

Applied behavior analysis (ABA) defined by the Indiana Institute on Disability and Community at Indiana University Bloomington, “involves various strategies and techniques which are evidence-based and utilized in working with individuals across the autism spectrum.” At UNIFI each child receives a customized plan that focuses on their strengths and areas of growth.

Examples of what ABA therapy may include:

• Language and Communication Support: Helping children build speech, use gestures, or communicate with assistive devices.
• Social Skills Training: Teaching how to share, play, and connect with peers.
• Behavior Support: Reducing behaviors that interfere with learning and encouraging positive alternatives.
• Independence Skills: From toileting to self-care, ABA helps children become more confident in daily life.
• Family Collaboration: Parents are included in the process, learning strategies to support progress at home.

This holistic approach empowers children not only to learn skills but also to use them in real-world settings.

 

Supporting Families from 18 Months to 18 Years

While much attention is given to early intervention, we understand that families may seek ABA therapy at many different points. That’s why we serve children from 18 months through 18 years old.

• Toddlers and Preschoolers: Focused on early communication, play, and behavior management.
• Elementary-Age Children: Targeting school readiness, peer interaction, and building confidence.
• Teens: Supporting independence, life skills, and preparing for transitions into adulthood.

Wherever your child is on their journey, UNIFI Autism Care can provide the right support.

 

Take the Next Step

If you’ve been searching for guidance on early signs of autism in toddlers: when to start ABA therapy, the best time to act is now. The sooner you start, the more opportunities your child has to build the foundation for lifelong success.

You don’t have to navigate this journey alone—we’re here to help every step of the way.

Get Started today by clicking below and give your child the support they need to thrive.

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Or Call Us:

(888) 717-5835

 

 

Frequently Asked Questions

1. At what age should ABA therapy start?
   ABA therapy can begin as early as 18 months old. The earlier intervention starts, the greater the positive impact on communication, social skills, and behavior.
2. What if my child is older than a toddler—can ABA therapy still help?
   ABA therapy is effective for children of all ages, up to 18 years old. Programs are personalized to meet your child’s developmental stage and goals.
3. How do I know if my toddler needs an autism evaluation?
   If you notice delays in speech, lack of eye contact, limited social interaction, or repetitive behaviors, it’s a good idea to talk to your pediatrician and request a developmental screening.
4. What skills does ABA therapy teach toddlers?
   ABA therapy helps toddlers with communication, social play, self-care routines, and reducing challenging behaviors. It sets the foundation for school readiness and long-term success.
5. How do I get started with ABA therapy?
   The first step is a consultation and assessment. From there, a personalized plan is created to meet your child’s needs.