FOXG1 UK Guide for Parents

This guide has been created by families who understand FOXG1 Syndrome first-hand. When many of our children were diagnosed, we were met with uncertainty and very little information. We know how overwhelming those early days can feel.

Since then, so much more has been learned about FOXG1, and we wanted to share that knowledge with you. More importantly, we want you to know that you’re not alone.

We hope this guide offers comfort, clarity, and a helpful starting point as you and your family begin your journey with FOXG1.

Never disregard professional medical advice or delay seeking it because of something you have read in this guide.

Newly Diagnosed

Hearing that your child has FOXG1 Syndrome can feel overwhelming. You may be experiencing a mix of emotions—confusion, fear, sadness, and uncertainty about what lies ahead. These feelings are completely natural.
Many of us have been where you are now. In the early days, it can feel like there are more questions than answers. While every child with FOXG1 is unique, you are not alone in this journey.
Over time, you will begin to learn more about your child’s individual needs, strengths, and personality. There will be challenges, but there will also be moments of joy, connection, and progress—often in ways you may not expect.
Take things one step at a time. It’s okay to ask questions, to seek support, and to lean on others who understand. Connecting with other families can be incredibly reassuring, and sharing experiences can help you feel less alone.
We hope this guide offers you a starting point—providing information, comfort, and a sense of community as you begin to navigate life with FOXG1.

What is FOXG1 Syndrome

FOXG1 Syndrome is a rare genetic condition that affects how the brain develops, particularly in early pregnancy. It is caused by a change (mutation) in the FOXG1 gene, which plays a critical role in the formation and function of the brain—especially areas involved in movement, communication, and learning.

Because this gene is so important during early brain development, changes in FOXG1 can lead to a range of neurological and developmental differences. For this reason, FOXG1 Syndrome is often described as a developmental and epileptic encephalopathy.

How does it affect individuals?
Children with FOXG1 Syndrome have a wide range of abilities and developmental outcomes. Some may develop limited speech, and a small number may learn to walk, while many do not reach these milestones.

Every person with FOXG1 Syndrome is unique, but there are some common features that families and clinicians may see:
Developmental delay: Most children have significant delays in reaching milestones such as sitting, standing, and walking.
Communication differences: Speech is often limited or absent, though many children communicate in other ways, such as through facial expressions, sounds, or assistive communication devices.
Movement differences: This may include low muscle tone (hypotonia), stiffness (hypertonia), or involuntary movements such as writhing or jerking motions.
Seizures: Some children develop epilepsy, which can vary in type and severity.
Feeding and gastrointestinal challenges: Difficulties with feeding, reflux, or constipation are common.
Sleep disturbances: Many families report disrupted sleep patterns.
Behavioural characteristics: These can include irritability, frequent crying in infancy, or episodes of laughter or agitation.