Many expectant parents worry about whether stress during pregnancy could cause their child to develop autism. This concern is understandable, especially given how common stress is during pregnancy. Here is what the current research actually shows.
What Studies Have Found
Some studies have found a statistical association between high levels of prenatal stress and a slightly increased likelihood of autism in offspring. A 2019 meta-analysis published in the Journal of Autism and Developmental Disorders reviewed multiple studies and found a modest association between prenatal stress exposure and ASD risk.
However, there are critical nuances to understand:
- Association is not causation. Finding a correlation between two things does not mean one causes the other. Many confounding factors, including genetics, could explain the link.
- Effect sizes are small. Even in studies that found an association, the increase in risk was modest. The vast majority of mothers who experience stress during pregnancy have neurotypical children.
- Normal stress is not the concern. The studies that showed associations typically involved extreme or chronic stress, such as bereavement, natural disasters, or domestic violence. Everyday worries about work, finances, or pregnancy itself are not the type of stress implicated in these studies.
The Bigger Picture: Autism Is Primarily Genetic
Current scientific consensus holds that genetics account for 60-80% of autism risk. Hundreds of genes have been identified that contribute to autism, and the condition tends to run in families. Environmental factors, including prenatal exposures, may play a modifying role but are not considered primary causes.
The prenatal factors that have the strongest research support as potential risk modifiers include:
- Advanced parental age (both parents)
- Certain prescription medications taken during pregnancy (like valproic acid)
- Gestational diabetes
- Extremely premature birth
- Prenatal exposure to high levels of air pollution
Even with these factors, the absolute risk increase is small. Most children exposed to these factors are not autistic, and many autistic children had none of these exposures.
Why Blaming Mothers Is Harmful
Historically, autism was wrongly blamed on mothers, from the debunked “refrigerator mother” theory of the 1950s to modern guilt-inducing headlines about prenatal behavior. This blame is unfounded and harmful.
No mother causes her child’s autism by being stressed, eating the wrong food, or not being perfect during pregnancy. Autism is a complex neurodevelopmental condition with deep genetic roots. Parents, and especially mothers, deserve support and compassion rather than blame.
Managing Stress During Pregnancy
While everyday stress is unlikely to affect your child’s neurological development, managing stress is still good for your overall health and well-being during pregnancy:
- Maintain regular prenatal care visits
- Practice gentle exercise like walking or prenatal yoga
- Connect with supportive friends, family, or support groups
- Limit exposure to anxiety-inducing news or social media
- Talk to your healthcare provider if anxiety or stress feels unmanageable
If Your Child Is Diagnosed with Autism
If your child receives an autism diagnosis, know that it is not your fault and that effective support is available. Early intervention through ABA therapy can help your child develop communication, social, and daily living skills. The earlier therapy begins, the better the outcomes tend to be.
At Treetop, we provide compassionate, individualized therapy across 11 states. Reach out to our team to learn how we can support your family. Most insurance plans are accepted.