University of Arizona
Ua: Diagnosis of Klinefelter's Syndrome
Brief tutorial dealing with Klinefelter's diagnosis. Provides illustration of nondisjunction and Klinefelter's karyotype. Information provided regarding other sex chromosome aneuploidies.
WebMD
Web Md: Klinefelter's Syndrome
This site from WebMD Health is a very informative approach to klinefelter's syndrome. It has a fairly in-depth topic overview, then discusses symptoms, exams, treatment, home care and other places to get help.