Early Signs of Autism in Toddlers: What to Watch and When to Talk to Your Pediatrician

If you've been reading about autism and quietly wondering whether some of what you're seeing in your toddler sounds familiar, this article is for you. That quiet worry — the one you search for at 11 PM — deserves a thoughtful, evidence-based response.

At Hummingbird Pediatrics in Robbinsville, NJ, we want to be the place you call when you're not sure. Autism spectrum disorder (ASD) is diagnosed more accurately and outcomes are better when concerns are raised early. This article is intended to help you know what to look for, how screening works, and why you should never wait to bring your concerns to us.

What Is Autism Spectrum Disorder?

Autism spectrum disorder is a neurodevelopmental condition characterized by differences in social communication and interaction, along with restricted, repetitive patterns of behavior or interests. It is a spectrum — meaning it presents very differently from person to person, ranging from children who are minimally verbal to those who are highly verbal but struggle significantly with social connection.

ASD affects approximately 1 in 36 children in the United States. It is not caused by vaccines, by anything parents did or didn't do, or by screen time.

Why Early Identification Matters

The brain is most plastic — most capable of change — in the first three years of life. Research consistently shows that children who receive early intervention services (speech therapy, occupational therapy, Applied Behavior Analysis) before age 3 make meaningful, often dramatic progress. Many children who receive early, intensive intervention reach typical developmental trajectories by school age.

This is not about fixing a child or taking away who they are. It is about giving every child the tools to communicate, connect, and thrive.

The single most important thing you can do if you are worried: **call your pediatrician now, not at the next scheduled visit.**

Developmental Red Flags by Age

Developmental variation is wide and normal. These are red flags — not diagnostic criteria — that warrant a conversation with your pediatrician.

12 Months

• Does not babble or use any vocalizations with communicative intent
• Does not gesture (point, wave, show objects to others)
• Does not respond consistently to their name being called
• Shows little or no social smiling in response to others
• Does not make eye contact with familiar caregivers

18 Months

• No single words spoken
• Does not point to show interest in things or to request (pointing to direct attention, not just to reach)
• Limited or no response to their name
• Does not follow a pointed finger to look where someone is pointing
• Does not engage in simple pretend play (putting a toy phone to their ear, "feeding" a doll)
• Difficulty with joint attention — sharing interest in something with another person by looking back and forth between the object and your face

24 Months

• No two-word phrases used spontaneously (not just repeating what others say)
• Loss of previously acquired language or social skills at any age — this always warrants immediate evaluation
• Limited or unusual eye contact
• Little interest in other children
• Does not point to things they find interesting or to show you something
• Repetitive play with objects (lining up toys, spinning wheels) without flexible or imaginative play
• Strong, distressing reactions to sensory input (certain sounds, textures, lights)
• Insistence on rigid routines with severe distress at changes

The M-CHAT: Screening at Your Well-Child Visit

At Hummingbird Pediatrics, we perform developmental screening at every well-child visit using validated tools. The M-CHAT-R/F (Modified Checklist for Autism in Toddlers, Revised with Follow-Up) is a standardized questionnaire completed by parents at the 18-month and 24-month well-child visits.

The M-CHAT asks about specific behaviors — like whether your child points to share interest, looks when you point at something, and plays pretend. Based on the results, we determine whether additional follow-up or referral is needed.

Screening is not diagnosis. A positive screen means your child should be evaluated further. A negative screen does not rule out autism in a child with other developmental concerns — always bring your specific worries to us regardless of screening results.

What to Do If You're Worried Right Now

Do not wait until the next scheduled well-child visit if you are concerned. Call our office and ask to discuss your child's development. We take these concerns seriously and will guide you through the appropriate next steps.

• Completing a developmental evaluation
• Referring to Early Intervention (for children under 3) — this is a federally funded program available in New Jersey that provides speech, occupational, and behavioral therapy
• Referring to a developmental pediatrician or child psychologist for formal diagnostic evaluation
• Requesting a hearing test to rule out hearing loss as a contributing factor

In New Jersey, you can also self-refer to Early Intervention by calling 1-888-653-4463. You do not need a diagnosis first — you only need documented developmental concerns.

What If It Turns Out Not to Be Autism?

Many children who raise developmental concerns during screening turn out not to meet criteria for ASD. What they often do benefit from is speech therapy, occupational therapy, or other early supports that help them catch up regardless of the underlying reason. Early referral is never wasted.

A Note to Parents

If you are worried, your worry matters. You know your child better than anyone. Pediatricians, teachers, and well-meaning family members sometimes say "wait and see." Research does not support this approach. If your gut is telling you something is different, bring it to us.

Our team at Hummingbird Pediatrics in Robbinsville is committed to listening to your concerns, taking them seriously, and connecting your family with the right resources as quickly as possible.

Frequently Asked Questions

What are the earliest signs of autism in a baby? Some early signs can appear in the first year: reduced social smiling, infrequent eye contact with caregivers, not responding to their name, and limited babbling or vocalizing with communicative intent. By 12–18 months, absence of pointing, waving, and joint attention are key red flags.

How is autism diagnosed? Autism is diagnosed by a specialist — typically a developmental pediatrician, child psychologist, or psychiatrist — through a comprehensive evaluation including structured observation, developmental history, standardized testing, and parent interviews. Your pediatrician's role is to screen, identify concerns, and refer appropriately.

Can a 2-year-old be diagnosed with autism? Yes. Autism can be reliably diagnosed as early as 18–24 months in many children. Early diagnosis allows earlier access to intervention, which leads to better long-term outcomes.

What should I do if I think my toddler has autism? Call your pediatrician to discuss your concerns as soon as possible — do not wait for the next scheduled visit. You can also self-refer to New Jersey's Early Intervention program (1-888-653-4463) for a developmental evaluation.

Does my child have autism or is it just a speech delay? Speech delay can occur with and without autism. Children with autism often have delays in communicative intent (pointing, waving, joint attention) in addition to language delays. Your pediatrician can help distinguish these and refer for appropriate evaluation and services.