Klinefelter syndrome, also known as XXY syndrome, is a genetic disorder that involves an additional X sex chromosome in males. Physiologically, males inherit one X chromosome from their mothers and ...

Q: I was reading the Connecticut Post when I came across the Ask Dr. Bea column on male menopause. I've noticed I have been experiencing some of the symptoms you described. I'm 5 feet, 7 inches tall ...

Israeli researchers have created cell lines, using cells donated by an individual with Klinefelter syndrome, that had different combinations of sex chromosomes but were otherwise isogenic. As reported ...

As many as one in 500 men may carry an extra sex chromosome — either an X or a Y — but very few of them likely know about it, a new study suggests. Very few of these men either reported being ...

Scientists have created healthy offspring from genetically infertile male mice, offering a potential new approach to tackling a common genetic cause of human infertility. Scientists have created ...

Klinefelter syndrome is a common genetic chromosomal condition that occurs when a boy is born with an extra copy of the X chromosome. Klinefelter syndrome can affect both physical and cognitive ...