Testosterone in men declines at a rate of around 1% a year from age 30. That doesn’t mean that men go through the ‘manopause’.
Women are increasingly seeking testosterone therapy to treat fatigue and brain fog. But there’s no evidence it improves symptoms of menopause.
For many years women were blamed for a couple’s infertility. But it’s now known that male factor infertility contributes to about 50% of total cases.
Why some now talk about ‘meaningful’ rather than fair competition in elite sport.
Our study found that low levels of INSL3 hormone were associated with greater risk of cardiovascular disease, diabetes and frailty in men.
Testosterone therapy is often essential for the health and well-being of transmasculine people. The choice to stop it to pursue pregnancy can be a difficult one.
The Fox News host’s forthcoming documentary ‘The End of Men’ is part of a rich heritage of hustlers and politicians claiming that American men are becoming devitalized, lazy and effeminate.
There is abundant evidence of the involvement of endocrine disruptors in reproductive dysfunction in several species, including humans.
Millions of people do not fit neatly into male or female sex designations at birth, and wrong identification can set them up for a lifetime of physical and mental harm.
New research suggests that despite the social mythology that surrounds testosterone in men, it may be much less important for life chances than previously thought.
Mandatory sex testing at the Olympics might have stopped in the 1990s, but the policing of high performance female athletes’ bodies is still ongoing.
Our research indicates the relationship between testosterone levels and athletic performance in females is not so simple.
Transgender youth have a number of research-backed medical options available to them. The multidisciplinary approach ranges from promoting family support to hormone treatments to surgery.
A growing online movement believes that giving up masturbation can make us happier and boost our testosterone levels.
New legislative proposals want to allow ‘sex testing’ of girl athletes through genital exams and genetic and hormone testing.
Claims that a product can boost testosterone levels imply that this will lead to a gain in muscle and strength.
Why does COVID-19 hit men harder than women? Is the disparity in mortality rates due to male hormones or an underlying difference in the male versus female immune system?
The science is not so clear cut.
The link between testosterone and empathy is complicated. We don’t have all the answers yet.
A new study of nearly 500,000 individuals finds that many genes affect same-sex behavior, including newly identified candidates that may regulate smell and sex hormones.