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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...     click for more information


AAKSIS  Brochure:
A Guide to Klinefelter Syndrome
Also available from the Documents page.

Understanding Klinefelter Syndrome: A Guide for XXY Males and Their Families
Robert Bock
Office of Research Reporting, NICHD. NIH Pub. No. 93-3202 August 1993.


Upcoming Meetings

To be announced...

Past AAKSIS National Conferences

  • 2008 - Minneapolis
  • 2007 - Chicago
  • 2006 - St. Louis
  • 2005 - Atlanta
  • 2004 - New York
  • 2003 - Chicago
  • 2002 - Columbus
  • 2001 - Philadelphia


 More Information
Klinefelter Syndrome - What To Expect, How To Respond?
Wolfram E. Nolten, M.D. F.A.C.P., University of Wisconsin Medical School.
Dr. Nolten gives a broad overview of the syndrome based on his reading of current research.
Klinefelter Syndrome and Other  Sex  Chromosomal Aneuploidies
Jeannie Visootsak, M.D. and John M Graham, Jr., M.D.


National Institute of Mental Health

The Child Psychiatry Branch of the National Institute of Mental Health is conducting a study of the effects of sex chromosomes on brain development.  If you would like information on participating in this study, please see the NIMH website for the

Klinefelter Syndrome Study