Signs of Autism in Infants

Autism Spectrum Disorder is a neurodevelopmental condition that affects communication, social interaction, and behavior. Early detection is crucial in helping children with autism reach their full potential. According to the Centers for Disease Control and Prevention (CDC), autism affects approximately 1 in 54 children in the United States. While there is no cure for autism, early intervention can improve outcomes for children with autism.

Early signs of autism can be observed in infants as young as 6 months old. In this article, we will discuss the signs of autism in infants and how to identify them.

Social Communication and Interaction

One of the most noticeable signs of autism in infants is a lack of social communication and interaction skills. Infants with autism may avoid eye contact and may not respond when their name is called. They may also not smile or express social interest in others.

Children with autism may also have difficulty forming and maintaining relationships with others. They may not initiate interactions with others or may not respond appropriately to social cues, such as someone waving hello or goodbye.

Another social communication and interaction sign of autism in infants is delayed babbling and speech. Infants with autism may not develop the ability to use gestures, such as pointing, or may take longer to start speaking, which is why it is essential to observe these behaviors carefully.

Sensory Issues

Many children with autism may have difficulties processing sensory information. They may be overly sensitive to sounds, textures, and other sensory input or may not be able to recognize pain as easily.

Sensory issues in infants with autism can manifest itself in different ways, such as avoiding being touched or held, covering their ears when hearing loud noises, or being overly sensitive to the touch of clothing.

Repetitive Behaviors

Children with autism often engage in repetitive behaviors that can serve as a coping mechanism for them. When it comes to infants, this may manifest itself in repetitive movements, such as rocking or flapping hands. Infants with autism may also focus excessively on specific objects or be interested in spinning or moving objects.

While some repetitive behavior is normal in infants, parents should look for the intensity and duration of their child’s behavior, as this may indicate autism.

Delayed Milestones

Infants with autism may experience developmental delays, such as crawling, walking, or talking. Parents should pay attention to motor development and observe whether their child is meeting developmental milestones at each stage.

Delayed milestones do not necessarily mean that an infant has autism. However, if parents notice a delay in their child’s development, they should consult their pediatrician.

How to Identify Signs of Autism in Infants

It is crucial to be aware of potential signs of autism spectrum disorder in infants actively. If you suspect your child may have autism, speak to your pediatrician.

Here are a few strategies to identify signs of autism in infants:

  • Observe your infant’s response to social overtures – Do they make eye contact and smile?
  • Monitor your infant’s speech development – Are they babbling and attempting to speak?
  • Notice how your infant reacts to sensory input – Are they overly sensitive to certain stimuli?
  • Watch for repetitive behaviors – Does your infant engage in repetitive behavior regularly?
  • Monitor your infant’s motor development – Are they meeting developmental milestones?


Early detection is crucial in helping children with autism reach their full potential. As parents, it is essential to be aware of the signs of autism in infants and to consult with your pediatrician if you have concerns.

There are many methods to support children with autism spectrum disorder, and early intervention is vital to improving outcomes. If you notice any signs of autism in your child, seek out resources in your community to help with diagnosis, treatment, and support. With proper diagnosis and treatment, children with autism can thrive and achieve their full potential.


What are some signs of autism in infants?

Some signs of autism in infants include delayed speech development, lack of eye contact, not responding to their name, repetitive behaviors, and poor social interaction. It is important to remember that while these may be indicators, each child develops differently and a professional diagnosis should be sought if there are any concerns.

When should I be concerned about signs of autism in my infant?

If you notice any signs of autism in your infant, it is important to seek professional advice from a doctor or therapist. Early intervention is crucial in supporting your child’s development and ensuring they receive the appropriate care they need.

What can I do to support my infant with autism?

Supporting an infant with autism includes early intervention with doctors and therapists, creating a routine to help them feel secure and comfortable, providing sensory-friendly experiences, and using visual cues to communicate. It is also important to educate yourself on the available resources and support systems in your area. With patience, consistency, and love, you can help your child reach their full potential.


1. Zwaigenbaum L, Bauman ML, Choueiri R, et al. Early Identification and Interventions for Autism Spectrum Disorder: Executive Summary. Pediatrics. 2015;136 Suppl 1(Suppl 1):S1-S9. doi:10.1542/peds.2014-3667c

2. Ozonoff, S., Young, G. S., Steinfeld, M. B., et al. (2009). How Early Do Parent Concerns Predict Later Autism Diagnosis? Journal of Developmental and Behavioral Pediatrics, 30(5), 367-375. doi:10.1097/DBP.0b013e3181ba0f28.

3. Bryson, S. E., Zwaigenbaum, L., Brian, J., et al. (2007). A Prospective Case Series of High-Risk Infants Who Developed Autism. Journal of Autism and Developmental Disorders, 37(1), 12-24. doi:10.1007/s10803-006-0348-5.