President Trump’s executive order recognizing only two sexes — male and female — includes language that is biologically ...

Patients with Klinefelter and triple X syndromes show an increased prevalence of SLE and Sjögren disease, likely due to the ...

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 ...

Klinefelter syndrome is characterized by an extra X chromosome (XXY), which emerges in 1/660 male births, often leading to reduced androgen levels and neurodevelopmental disorders. Participants ...

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 ...

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 ...

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 ...