Welcome to www.genetic.org. This Web site is sponsored by Klinefelter Syndrome and Associates and is designed to provide support and education for families and professionals dealing with the following genetic conditions: Klinefelter Syndrome and Associates Provides support for sex chromosome variations 47XXY, 48XXYY, 48XXXY, 49XXXY, and 49XY/XXY Human Growth Foundation Provides support for short ...

Case presentation on a six-year-old boy with precocious puberty