Hearing that the first child has autism can raise many questions about future pregnancies. One of the most common concerns parents have is, "If my first child is autistic, will my next child be too?" While autism runs in families, having one child with autism does not mean the second child will also be diagnosed.
Research shows that autism sibling risk is higher when compared with the general population, but each pregnancy is unique and influenced by a combination of genetic and environmental factors.[1,2]
What Does the Research Say?
Studies estimate that the autism recurrence risk in siblings is higher than the risk for families without a history of autism. However, recurrence does not mean certainty. Scientists believe Autism Spectrum Disorder (ASD) develops through a complex interaction between genetics and environmental influences rather than a single inherited cause. This is why the likelihood of autism in a second child varies from one family to another.[2,3]
Can Families Prepare for a Future Pregnancy?
Parents planning another pregnancy may benefit from genetic counseling, prenatal health evaluation, and discussions with their healthcare provider about family history. Although there is no test that can predict autism before birth, appropriate maternal screening and early developmental monitoring after birth can help identify concerns sooner. For younger siblings, recognising the early signs of autism in children and seeking timely evaluation can support early intervention, which is associated with better developmental outcomes.[3,4]
What Should Parents Remember?
Many families who have one autistic child go on to have children who do not have autism. Rather than focusing on uncertainty, parents can benefit from understanding their family's risk, maintaining regular prenatal care, and ensuring developmental screening during infancy. If you are scared your next child will have autism, speaking with a healthcare professional can provide personalised guidance and help you make informed family planning decisions.
Book Prenatal FRAT Screening
If you are planning another pregnancy and would like to better understand autism-related risk factors, book a Prenatal FRAT Screening consultation. Our specialists can review your medical history, discuss available evaluations, and guide you on evidence-based next steps for your growing family.
Frequently Asked Questions
Should I have another baby if my child has autism?
Many families with one autistic child have another child who does not have autism. Your decision should be based on personal, medical, and family considerations discussed with your healthcare provider.
What are the odds my second child will have autism?
Research suggests the risk is higher than in the general population, but most younger siblings are not diagnosed with autism. Individual risk varies between families.
Can autism skip a generation?
Autism does not follow a simple inheritance pattern. Multiple genetic and environmental factors contribute to its development, so it cannot be described as "skipping a generation" in the traditional sense.
Is autism genetic from the mother or father?
Current evidence shows that genetic factors from both parents can contribute to autism risk. No single parent is solely responsible.
Will my second child have autism if my first does?
Having one autistic child increases the chance compared with the general population, but it does not mean a second child will also have autism.
What are the signs of autism in a younger sibling?
Early signs may include limited eye contact, delayed communication, reduced social interaction, repetitive behaviors, or delayed developmental milestones. Any concerns should be discussed with a developmental pediatrician.
Can an autistic parent have a child without autism?
Yes. Autism is influenced by many genetic and environmental factors. Many autistic parents have children who are not diagnosed with autism.
Does my child have autism symptoms?
Only a qualified healthcare professional can diagnose autism. If you notice developmental concerns, arrange an early developmental assessment rather than relying on symptoms alone.
References
- Recurrence risk for autism spectrum disorders: a Baby Siblings Research Consortium study. Pediatrics. 2011
- The heritability of autism spectrum disorder. JAMA. 2017
- Autism spectrum disorder. Nat Rev Dis Primers. 2020
- Identification, Evaluation, and Management of Children With Autism Spectrum Disorder. Pediatrics. 2020