When my son Kyle was first being evaluated and diagnosed, one of the things he was tested for was fragile X syndrome (FXS). It’s a good idea for any child who falls on the autism spectrum or has unexplained mental retardation to be screened for this condition. Fragile X syndrome is the most common known single-gene cause of autism or autistic-like behaviors, and is typically associated with mental impairment. 2% to 6% of children diagnosed with autism are eventually diagnosed with fragile X. What is fragile X syndrome? Like the name indicates, fragile X syndrome is a congenital condition resulting … Continue reading →