Here is a complete explanation of what Klinefelter is, from the causes, signs or symptoms, to how to treat it.

Klinefelter syndrome is a genetic condition that affects only males. Here's what you should know about the causes, symptoms, ...

A genetic evaluation demonstrated Klinefelter syndrome 47, XXY karyotype with concurrent duplication of 3p21.31 by microarray analysis. Maternal genetic analysis demonstrated the same 3p21.31 ...

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 ...