Who Passes Inherited Autism Traits More (Mother or Father)? 

The question of whether inherited autism traits are more likely to be passed on by the mother or father has intrigued many researchers. While autism has a strong genetic basis, inheritance patterns can be complex. Both parents can contribute to the transmission of traits that increase the risk of autism, but emerging evidence suggests some important differences. 

The Role of Genetics in Inheriting Autism 

Recent studies indicate that genetic risk for autism may be slightly more pronounced when passed from the mother. This is partly since some autism related genes are carried on the X chromosome, which females have two of, compared to males who have only one. This means that mothers may be more likely to pass on these traits, especially if they carry a genetic mutation or variant related to autism. 

However, fathers can also contribute significantly to risks. Studies have shown that autism inheritance can also stem from paternal genetic factors, and recent research points to mutations that occur in the father’s genes as a possible contributing factor. As such, the contribution of both parents is crucial, and the expression of family history of autism can impact how these traits are passed down. 

Understanding the Genetic Influence:

Understanding the inherited autism traits and genetic risk factors in the family can help parents recognise early signs and take appropriate steps for diagnosis and intervention. If there’s a history of autism in the family, seeking genetic counseling may provide clarity and insight into the likelihood of traits being passed on.  

Visit providers like Autism Detect for personal consultations to learn more about how autism may manifest in your family. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to inherited traits and family history.

Beatrice Holloway, MSc

Author

Beatrice Holloway is a clinical psychologist with a Master’s in Clinical Psychology and a BS in Applied Psychology. She specialises in CBT, psychological testing, and applied behaviour therapy, working with children with autism spectrum disorder (ASD), developmental delays, and learning disabilities, as well as adults with bipolar disorder, schizophrenia, anxiety, OCD, and substance use disorders. Holloway creates personalised treatment plans to support emotional regulation, social skills, and academic progress in children, and delivers evidence-based therapy to improve mental health and well-being across all ages.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.