How many people have fragile x syndrome?

The estimated prevalence of Fragile X syndrome is 1 in 4,000 males and 1 in 8,000 females worldwide. This means that there are approximately 1,250,000 people with Fragile X syndrome in the world, with around 312,500 of these individuals being female and 937,500 being male. The prevalence of Fragile X syndrome is highest in the United States, where it is estimated to affect 1 in 2,500 males and 1 in 5,000 females.