Klinefelter syndrome is a trisomy of the sex chromosomes. Most commonly (around 82 percent of the time) there is an extra X chromosome (an XXY arrangement). In 10 to 15 percent of men with ...

This syndrome is characterized by the presence of one or more extra X chromosomes, and the karyotype 47,XXY is the most prevalent type. The 'prototypic' man with Klinefelter syndrome has ...

Turner syndrome can also result in miscarriage or stillbirth. Klinefelter syndrome, also known as XXY syndrome, is the result of an extra X chromosome in people assigned male at birth. It is ...

"You either have XX or XY chromosomes," Rep. Nancy Mace, R-S.C., wrote Feb. 20 on X. "Those are the options." Most commonly, a person is born with two X chromosomes (female) or an X and a Y (male).

I gave birth to a beautiful baby girl with almond shaped eyes,” a woman named Sarah wrote on Cincinnati Children’s Hospital’s website. “The doctors and nurses didn’t notice, but I did. After days of ...

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 ...