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New research shows men with very low testosterone levels are at higher risk of both fatal and nonfatal cancer later in life. But while the research found men with low testosterone were 18% more likely to die of cancer years down the track, the results did not hold for prostate ca

Testosterone may play a bigger role in the emotional development of girls entering puberty than previously thought, according to new research from the University of Georgia published in Psychoneuroendocrinology. Greater changes in the hormone were linked to more emotional difficu

Exclusive: Researchers warn of ‘major crisis in male reproductive health’ partly driven by obesity and diabetesMen’s average testosterone levels have halved over the past 50 years, according to scientists, who say society is facing a male fertility crisis.Total testosterone level

Sperm counts are in decline worldwide, and testosterone levels are said to be plunging, but male infertility still carries a stigma. Prof Michael Carroll on what every man should knowWhen we talk about infertility, the focus tends to be on the woman. After some basic tests, IVF i

Men’s average testosterone levels have halved over the past 50 years, according to scientists who say society is facing a male fertility crisis. Rising levels of obesity and diabetes are expected to play a part, but the team behind the work suggest that environmental factors such

Reports of falling sperm counts and testosterone levels have fuelled fears over chemicals, pollution and modern lifestyles. But how much do scientists agree on what is affecting male fertility?The world is unwittingly walking into a male reproductive crisis, scientists warned thi