How many people are premutation carriers for the Fragile X gene?

The number of individuals in the U.S. who have or are at-risk for a premutation-associated condition range from:

  • 1 in 151 females, or about 1 million women.
  • 1 in 468 males, or about 320,000 men.

(Worldwide, the numbers could total over 60 million!) 

It is important to remember that these are estimated ranges and not exact numbers. Whatever the number, the NFXF believes there are a very significant number of people who need the information and guidance that it provides! 

For more information on premutation carriers: click here.