Testosterone News

Anger is mounting in South Africa over new athletics rules prescribing maximum testosterone levels in female competitors widely seen as targeting the country's Olympic champion Caster Semenya.

South Africa's athletics federation on Thursday said it would challenge new rules governing female athletes' testosterone levels, which affect the nation's Olympic champion Caster Semenya.

Prior studies have showed that before puberty boys have approximately 1.5 times higher rate of asthma than girls.

Testosterone is a steroid hormone involved in the regulation of sexual function, urinary health and metabolism as well as a number of other critical functions. 

The study in France also revealed that the testosterone in male suppresses the production of a type of immune cell that triggers allergic asthma and acts as a barrier against them in developing the inflammatory airway condition.

Men are more likely to have infertility with less sleep than women, said IVF experts on Thursday.

The quality of a man's sperm decreases with age, after 30, most men begin to experience a drop in testosterone. 

 The researchers concocted a game with 40 volunteers -- half were given an injection of testosterone while the other half were given a placebo.

Though most people think testosterone is 'masculine hormone', but the fact is that ovaries produce both estrogen and testosterone.

The researchers found that, as a group, men prescribed testosterone for longer than a year had no overall increase in risk of prostate cancer.

Testosterone helps men regulate blood sugar by triggering key signaling mechanisms in islets -- clusters of cells within the pancreas that produce insulin, the researchers identified.

Testosterone therapy may help reduce risks of major adverse cardiovascular events, including stroke and heart attacks, in elderly men with coronary artery disease, a new study has found.

They were split into three different groups which received varied doses of testosterone administered either by injection or gel.

Low levels are linked to an increased risk of cancer and reduced mental abilities.

Women who have high levels of both testosterone and estrogen in midlife may face a greater risk of developing benign tumours on the uterus called uterine fibroids than women with low levels of the hormones, reveals a new study.

The new study focuses on a large, representative sample of aging US men and the ways their testosterone varies when they have emotionally supportive relationships.