Testosterone can affect the cholesterol levels in your body which influences heart health by changing the balance of good and ...

A gene regulating testosterone in ruffs produces three male morphs with unique behaviors, offering insights into vertebrate biology and potential human therapeutic applications. A single gene regulati ...

A single gene that regulates testosterone levels in a "crazy" species of shore bird controls the development of three wildly ...

There are three morphs in ruffs that differ in their appearance and mating behavior. Males of the aggressive Independents ...

Some men have medical conditions that impair testicular testosterone production, such as Klinefelter’s syndrome. This type of testosterone deficiency is known as primary testicular failure or ...

The test is fast and safe, similar to any other type of bloodwork. If your testosterone blood test shows your levels are out of the normal range for your sex and age, you may need additional ...

We normally associate high testosterone levels with male dominance and aggression. Among ruffs – a shore bird that breeds ...