Patient Education and Resources
Klinefelter syndrome is a genetic condition in which boys are born with an extra copy of the X chromosome (XXY). This condition may lead to various medical problems, which may include small testes, infertility, and learning and mental health challenges. However, not everyone experiences the same problems. Most people with Klinefelter syndrome lead healthy lives with proper medical care and education.
About Klinefelter Syndrome
Organizations and Websites
- The Association for X and Y Chromosome Variations (AXYS): AXYS is an advocacy, education and support organization for individuals with X and Y chromosome variations and their families.
- Living with XXY: Blogger and Klinefelter syndrome advocate Ryan Bregante shares his story and advice about living with Klinefelter syndrome.
- National Human Genome Research Institute: Klinefelter Syndrome
- The Hormone Foundation: Klinefelter Syndrome
- Genetic and Rare Diseases (GARD) Information Center: Klinefelter Syndrome