Fragile X is a family of genetic conditions, which can impact individuals and families in various ways. These genetic conditions are related in that they are all caused by gene changes in the same gene, called the FMR1 gene.
Fragile X includes:
fragile X syndrome (FXS), the most common cause of inherited mental impairment. This impairment can range from learning disabilities to more severe cognitive or intellectual disabilities. (Sometimes referred to as mental retardation.) FXS is the most common known cause of autism or "autistic-like" behaviors. Symptoms also can include characteristic physical and behavioral features and delays in speech and language development.
fragile X-associated tremor/ataxia syndrome (FXTAS), a condition which affects balance, tremor and memory in some older male gene carriers.
fragile X-associated premature ovarian failure (POF), a problem with ovarian function which can lead to infertility and early menopause in some female gene carriers.
Some gene carriers do not exhibit any of these features. To learn more about carriers click here.
Fragile X can be passed on in a family by individuals who have no apparent signs of this genetic condition. In some families a number of family members appear to be affected, whereas in other families a newly diagnosed individual may be the first family member to exhibit symptoms.
The National Fragile X Foundation (NFXF) has been helping individuals with Fragile X, their families, and the professionals who work with them, since 1984. As research into Fragile X continues, our understanding of who it affects and how it affects them will grow. The NFXF is committed to keeping the Fragile X community well informed.
www.fragilex.org
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