Many physicians underestimate the prevalence of Klinefelter syndrome and so fail to recognize its more obvious features. Increased awareness of its effects on physical, psychological, and social development should help to dispel persistent misconceptions about the condition and enable earlier diagnosis and more effective treatment. New Zealand Sex Chromosome Society Klinefelter Syndrome Support Group Home Page .
Literature is available in Danish, English, and German.
Understanding Klinefelter Syndrome, A Guide for XXY Males and their Families.