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The American Association for Klinefelter Syndrome Information and Supoprt

The American Association for Klinefelter Syndrome Information and Support (AAKSIS) is a national volunteer association with the mission of education support, research, and understanding of 47 XXY and its variants, collectively known as Klinefelter syndrome.

National Institute of Child Health and Human Development

More in depth condition information for Klinefelter Syndrome is available at the National Institute of Child Health and Human Development.

Klinefelter Syndrome Article

The Klinefelter's Syndrome Association offers support and information to all affected by, or having an interest in. They have information available which can assist employers, teachers, social workers, and medical professionals.

Klinefelter Syndrome Association UK

The Klinefelter Syndrome Association offers support and information to all affected by, or having an interest in. They have information available which can assist employers, teachers, social workers, and medical professionals

Klinefelter Syndrome Information and Support

This website offers a wealth of information on Klinefelter, including current research studies, support group information, informative resources, and symptoms and educational informationThis website offers a wealth of information on Klinefelters, including current research studies, support group information, informative resources, and symptoms and educational information