How prevalent is the disease in the population?

• Many researchers believe that 1 in 4,000 males are affected by Fragile X Syndrome and 1 in 8,000 females are affected by the syndrome.
• Although many researchers believe that these statistics are correct, may believe that it is hard to tell how much of the population is affected.
• Many researchers think that 80-90% of the people with the syndrome have not been diagnosed.
• It is because of this that some researchers believe that 1 in 1,000 males are affected and 1 in 2,500 females are affected.