Klinefelter syndrome is a genetic condition in which a boy is born with an extra X chromosome. Instead of the typical XY chromosomes in men, they have XXY, so this condition is also called XXY ...

Klinefelter syndrome is the most common sex-chromosome disorder; it affects approximately one in every 660 men. This syndrome is characterized by the presence of one or more extra X chromosomes ...

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 ...

Those conditions include Klinefelter Syndrome (XXY), Turner Syndrome (missing ... cases in which someone’s anatomy does not neatly fit into male or female. We often hear the expression that ...

Issues with the hypothalamus and pituitary glands, as well as genetic conditions like Klinefelter syndrome, play significant roles in male fertility decline. The hypothalamus and pituitary glands ...

For those with Klinefelter syndrome, this painful reality is a constant struggle. How does an extra X chromosome lead to infertility in men? Professor Qiao Jie and her team at Peking University ...

Professor Qiao Jie and her team at Peking University Third Hospital revealed why Klinefelter syndrome, a common genetic condition affecting one in every 600 men, often leads to infertility—and ...

SMALL testes and aspermia are both characteristic features of Klinefelter's syndrome, and histological examination of the testes usually shows a lack of active spermatogenesis. Biopsies on testes ...

Of the 113,748,373 patients identified, 1975 were men with Klinefelter syndrome and 1136 were women with triple X syndrome. “The extra X chromosomes in [Klinefelter syndrome] (47, XXY ...