About 15% of men with nonobstructive azoospermia have Klinefelter syndrome. The testes of men with the nonmosaic (47,XXY) form of this condition show only rare, focal areas of spermatogenesis ...

Men with Klinefelter's syndrome have an extra X chromosome, meaning their genetic makeup is “47, XXY” instead of the usual “46, XY.” They usually lose large amounts of key reproductive ...

In general, this syndrome affects only females, except in rare cases of boys with Klinefelter syndrome (47,XXY). For more information regarding why this disease is most commonly seen in girls, see ...

Men with Klinefelter syndrome have an extra X chromosome, meaning their genetic makeup is "47, XXY" instead of the usual "46, XY." They usually lose large amounts of key reproductive cells before ...