Fragile X Syndrome
A genetic condition linked to the X chromosome affecting learning and anxiety.
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Overview
Fragile X Syndrome is most common inherited cause of learning disability and leading genetic cause of autism. Caused by mutation in FMR1 gene on X chromosome. X-linked so males more severely affected than females who have two X chromosomes one potentially compensating. Affects roughly 1 in 4000 males 1 in 8000 females UK. Boys typically have moderate learning disabilities girls may have milder difficulties or just learning differences. Around 50 percent males 20 percent females with Fragile X also meet autism criteria. Characteristic features include long face large ears social anxiety hand-flapping or hand-biting when stressed. Speech language delays common. Sensory sensitivities overlap with autism. Many boys friendly sociable but overwhelmed in busy environments. No cure but early intervention speech therapy occupational therapy educational support makes significant differences. Many adults work in supported employment live semi-independently. Female carriers may experience early menopause or tremor ataxia syndrome FXTAS in later life.
Key Characteristics
- X-linked genetic condition affecting learning
- Learning disability mild to moderate
- Speech and language delays
- Social anxiety and shyness with peers
- Sensory sensitivities and overwhelm
- Hand-flapping hand-biting when stressed
- Often co-occurs with autism 50 percent males
- Long face large ears features variable
What Helps
- Early intervention speech OT educational support
- Calm predictable environments
- Visual supports and routines
- Sensory accommodations
- Social skills support in small groups
- Gentle approaches avoid pressure
- Genetic counselling for families
- Transition planning for adulthood
- Medication for anxiety when appropriate
- Specialist Fragile X clinics
Note: Informational only. Consult professionals for individualised support.