Do Inherited Autism Genes from Both Parents Add Up Risks? 

The question of whether autism gene risk from the parents adds up to increased risk is a complex one. Research suggests that genetic contributions from both parents can influence the likelihood of a child developing autism, but it’s not as simple as merely combining the risks. Autism is influenced by a combination of genetic and environmental factors, making the inheritance pattern more intricate. 

Understanding the Hereditary Contribution to Autism 

The autism genetic risk is inherited from both parents, but the effect doesn’t necessarily multiply when genes are inherited from both sides. Autism is likely the result of multiple genetic variations, some of which may interact differently depending on the combination of genes inherited. While specific genetic factors from each parent may increase the risk, the interaction between those genes plays a crucial role in whether autism develops. Recent research has shown that certain genetic markers can raise the risk of autism, and these can be inherited from either or both parents. However, it’s not about simply adding the risk from both parents. Other factors, like environmental influences, can also shape whether a child is diagnosed with autism. Thus, while the inherited traits from mother and father might raise the chances, it is not a straightforward calculation. 

Understanding the genetic variations is vital for parents concerned about autism risks. It highlights the complexity of inheritance and shows that many factors are at play. For those interested in understanding more, genetic counseling can offer insights into individual risks. 

Visit providers like Autism Detect for personal consultations to better understand autism risk and how genetics may play a role in your family history. 

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.