A testosterone blood test can also be performed to help ... Secondary hypogonadism occurs when the testicles work properly, but parts of the brain, like the pituitary gland and hypothalamus ...

Testosterone levels are measured through blood tests, and in the UK ... I have seen them work for people,' says GP and hormonal therapy expert at Omniya London, Dr Sohere Roked.

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

The treatment has become increasingly popular, especially among older men. Here is what to keep in mind if you are ...

A gene regulating testosterone in ruffs produces three male morphs with unique behaviors, offering insights into vertebrate ...

Earlier studies had shown that both types of males have significantly lower testosterone levels in their blood. The new paper identifies the exact gene that produces the super enzyme controlling ...

We normally associate high testosterone levels with male dominance and aggression. Among ruffs – a shore bird that breeds across Europe and Asia – some males suffer from too much of it. Together with ...

Most testosterone is produced in the testes, and the blood carries it to other parts of the body. A recent study led by Clemens Küpper has now shown how male ruffs get rid of testosterone. This begs ...