Fragile X, or Fragile X Syndrome (FXS) is one of the most common genetically inherited neurodivergencies. It often has a degree of learning (intellectual) disability.

Twice as many boys than girls are diagnosed with it – a mother having a 50% chance of passing it to her children, a father having a 100% chance of passing it to his daughters and 0% chance of passing it to his sons.

Not all people with Fragile X have cognitive impairments or behavioural challenges, though these are more marked in boys.

If you’d like to know more, the National Fragile X Foundation has plenty of information written in friendly language. They’ll also email a guide for the newly-diagnosed on request.