Fragile X Syndrome

Fragile X syndrome is an inherited condition that causes learning and behavior problems. It occurs in ~ 1 in 4,000 males and 1 in 5,000 to 8,000 females. Children and adults with fragile X syndrome can have

  • development and learning delays
  • attention deficits and hyperactivity
  • anxiety
  • autism, or autistic-like behaviors

Physical features can vary, but common ones can include

  • large ears
  • long narrow face
  • hyperflexible joints

The mildness or severity of learning and behavior problems vary with each person. In general, males tend have more severe symptoms than females. When affected with fragile X syndrome, a person can face challenges in learning, health and behavior throughout their lifetime, but it is important to remember that each person faces their own road that is not pre-determined.

For more information on living with fragile X syndrome, contact the National Fragile X Foundation at