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Do maternal immune conditions function as environmental factors that unmask autism genes? 

Posted
Updated
ByMy Patient Advice
Author: Lucia Alvarez, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Yes, maternal immune conditions & autism gene unmasking are an important area of research, with evidence suggesting that certain immune-related conditions during pregnancy can act as environmental factors that may unmask or activate autism genes. While genetics plays a central role in autism, environmental exposures such as maternal immune responses can interact with genetic predispositions, potentially triggering the expression of autism traits that may have otherwise remained dormant. 

Conditions like autoimmune diseases, allergies, or infections during pregnancy can cause inflammation, which may affect the developing brain of the foetus. This immune system activation may alter gene expression, “unmasking” autism-related genes and influencing neurodevelopment. 

Speak to an Autism clinician near you

How Maternal Immune Conditions Might Unmask Autism Genes 

Here are two ways maternal immune conditions could act as environmental unmasking factors for autism genes: 

Immune system activation during pregnancy 

Maternal immune conditions, such as autoimmune diseases, can lead to the production of inflammatory cytokines. These cytokines can cross the placenta and influence brain development; potentially activating or unmasking genes associated with autism in genetically predisposed individuals. 

Changes in gene expression due to inflammation 

Inflammation can alter the expression of genes that are vital for brain development. This alteration may trigger or amplify autism traits, particularly in those with underlying genetic susceptibility. 

Understanding the relationship between maternal immune conditions & autism gene unmasking highlights the importance of monitoring maternal health during pregnancy to reduce the risk of triggering autism-related genes. Visit providers like Autism Detect for personal consultations and further guidance on screening and support. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Environmental Factors. 

Lucia Alvarez, MSc
Author

Lucia Alvarez is a clinical psychologist with a Master’s in Clinical Psychology and extensive experience providing evidence-based therapy and psychological assessment to children, adolescents, and adults. Skilled in CBT, DBT, and other therapeutic interventions, she has worked in hospital, community, and residential care settings. Her expertise includes grief counseling, anxiety management, and resilience-building, with a strong focus on creating safe, supportive environments to improve 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 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. 

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