An imbalance of testosterone can result in large breasts in these men. Learn about the procedures, the consultative process, & see photographs before and after surgery.

Brief introduction to the genetic anomaly includes links to KS support groups, intersex resources, and contact information.

Canadian-based site offers disease information, treatment descriptions, and links for men with KS and their families.

Read an overview of the characteristics and treatment of this condition and its chromosomal variants.

Offers a guide to the disease and its variants, with links and pictures.

Mailing list for parents of children with with non-XXY types of Klinefelter Syndrome offers support and advice.

Mutual support for men, families, and professionals dealing with Klinefelter Syndrome.

Support forum for wives and girlfriends of men with Klinefelter Syndrome requires registration to join.

Restricted-membership mailing list offers support to parents dealing with Klinefelter Syndrome and other sex chromosome conditions.

Discussion forum offers advice and support for parents of teenagers with Klinefelter Syndrome. Find out how to join.