What Are the Three Main Causes of Autism?

An ABA therapist playing with smiling autistic girl by window during in-home ABA therapy in Maryland.

Autism Spectrum Disorder (ASD) doesn’t have a single cause. Instead, research shows it develops from a combination of factors that influence how the brain grows and functions. The three main contributors are:

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  1. Genetics – Autism often runs in families. Certain genetic variations can increase the likelihood of a child being diagnosed with ASD.
  2. Brain Development – Differences in brain structure and connectivity play a role in how individuals with autism process information and interact with the world.
  3. Environmental Factors – Prenatal influences, such as parental age, complications during pregnancy or birth, and certain exposures, may contribute to the risk.

It’s important to remember that autism is not caused by parenting style, vaccines, or anything families “did wrong.” Each child’s experience with autism is unique, and no two journeys look the same.

While causes may vary, what matters most is early intervention. ABA therapy can help children with autism build communication, social, and daily living skills that empower them to thrive.

At Able Stars ABA, we provide compassionate, personalized ABA support for families across Maryland.

Want guidance tailored to your child’s needs? Contact us today to get started.

SOURCES:

https://www.mayoclinic.org/diseases-conditions/autism-spectrum-disorder/symptoms-causes/syc-20352928

https://www.autismspeaks.org/what-causes-autism

https://www.niehs.nih.gov/health/topics/conditions/autism

Causes, Signs and Symptoms

https://touroscholar.touro.edu/sjlcas/vol9/iss1/15

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