Can ADHD skip generations due to genetic factors?

PostedAugust 18, 2025

UpdatedSeptember 3, 2025

ByMy Patient Advice

Author: Lucia Alvarez, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Yes, it is possible for ADHD to seem as though it skips a generation. This phenomenon, known as an ADHD generational skip, occurs when individuals carry the genetic predisposition for ADHD but don’t express noticeable symptoms themselves, while their children or grandchildren do. ADHD is influenced by a mix of dominant and recessive gene interactions, environmental exposures, and developmental variables. That means someone can be a carrier of ADHD-related genes without displaying the full condition.

This helps explain why a grandparent and grandchild might both have ADHD, even if the parent in between does not.

Why ADHD might seem to skip generations

Here’s how this genetic pattern plays out across family lines.

ADHD skip generations

Just because ADHD isn’t visibly present in one generation doesn’t mean it’s absent genetically. The condition might simply be underdiagnosed, masked by coping mechanisms, or expressed differently, leading to an apparent ADHD skip across generations.

ADHD recessive genes

Some genes related to ADHD may only show effects when inherited from both parents, similar to how other recessive genes work. This may cause ADHD traits to stay dormant for a generation before re-emerging in a child.

ADHD genetic patterns

ADHD tends to follow complex genetic patterns, influenced by multiple genes and interactions. This makes inheritance unpredictable at times, even within the same family.

Understanding the concept of an ADHD generational skip can prompt more thorough family evaluations and earlier interventions. Visit providers like ADHD Certify to explore family-focused diagnostics and support rooted in multigenerational health.

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

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.