People who have one of several well-documented medical conditions do not have only XX or XY chromosomes, which typically correspond with female and male sexes, respectively. Those conditions include ...

A recent Trump executive order defines sex based on gamete size. But the order oversimplifies genetics, hormones and reproductive biology.

Testosterone therapy nearly halves mortality in men with Klinefelter syndrome, highlighting the need for early diagnosis and ...

Testosterone therapy in men with Klinefelter syndrome has been found to improve quality of life and nearly halve mortality rates.

Testosterone treatment significantly reduces mortality among men with Klinefelter syndrome. Researcher calls for changes in ...

It happens in people assigned female at birth. XXY happens in people assigned male at birth, with a condition called Klinefelter syndrome. Is Turner syndrome tied to autism? People with Turner ...

Metabolic syndrome is a constellation of conditions that together increase the risk of type 2 diabetes, stroke, and cardiovascular problems, including heart attack. The features of metabolic syndrome ...

In addition, sex chromosomal abnormalities like Turner syndrome and Klinefelter syndrome may have an effect on physical and reproductive development. While some defects are inherited, many are ...

What is Zollinger-Ellison syndrome? Zollinger-Ellison syndrome (ZES) is a rare digestive disorder. If you have ZES, you likely have 1 or more tumors in the first part of the small intestine, the ...

In 2022, Dion announced that she was diagnosed with stiff person syndrome, a rare neurological disorder that causes muscle spasms and impacts her ability to sing. At the time, Dion canceled all of ...