Klinefelter's syndrome is a genetic abnormality that affects only males. Named after an American physician, Harry Klinefelter in 1942, Klinefelter's syndrome affects approximately 1 per 1,000 males, making it a very common genetic abnormality.
Chromosomes are genetic material and a person's sex is determined by X and Y chromosomes. Males usually have one X and one Y chromosome (XY). Males with Klinefelter's syndrome have extra X chromosome (XXY).
Althought the extra sex chromosome is common the syndrome itself, its signs and symptoms, are not. Most men with an extra X chromosome never realize they have an additional chromosome.
Causes of Klinefelter's Syndrome
Women who have babies after the age of 35 have a slightly higher incidence of Klinefelter's Syndrome.
Signs Symptoms of Klinefelter's Syndrome
Test for Klinefelter Syndrome
Genetic tests will show the presence of an extra X chromosome.
Treatment for Klinefelter's Syndrome
Klinefelter's syndrome may be identified in adolecense when the testes do not develop when they should. Testosterone therapy can have a number of positive effects although most men with Klienfelter's are never able to father a child. However testosterone can improve sex drive, promote hair growth, increase muscle strength.
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