Annet Negesa, Uganda’s 800-meter Olympic hopeful, says she was advised to undergo an irreversible surgery because of naturally elevated testosterone levels. Her career has never been the same.

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Morocco winger Nordin Amrabat doesn’t remember much of anything about his team’s defeat against Iran in the 2018 FIFA World Cup. It is not that he would rather forget being on the losing side of the match. It’s that he sustained a concussion during it, which led to some memory loss. Team medical staff later ruled Amrabat out for training and the next match. But, five days later, he was in uniform and playing in a match against Portugal.

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23andMe is taking a lot of heat as one of the DNA aggregators whose databases may not be secure from prying third-party eyes. That is a huge issue, but the company is engaging in even more troubling behavior—using genetics to sponsor racism.

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Caster Semenya of South Africa, heavily favored to win the Olympic women’s 800 meters, ran a quick opening round this week and then breezed past reporters.  Who could blame her?  Perhaps no female athlete has faced such brutal scrutiny by fellow competitors, sports officials and journalists.

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There is a “very low risk” of further international spread of Zika virus as result of the Olympic Games to be held in Brazil, the heart of the current outbreak linked to birth defects, World Health Organization (WHO) experts said on Tuesday.

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New research bolsters evidence that a simple blood test may someday be used to detect concussions. It suggests that a protein linked with head trauma may be present in blood up to a week after injury, which could help diagnose patients who delay seeking treatment.

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Cliff Ward Jr. is a self-described football nut. The Hebron, Ohio, resident first played football in third grade. His father was a high-school football star. But his 9-year-old son, Ty, is playing something different—flag football, on a local YMCA team.

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Medical experts and National Football League (NFL) officials will gather with peers from other top global sports on Saturday in a bid to accelerate how to properly diagnose and treat player concussions.

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A total of 87 out of 91 former NFL players have tested positive for the brain disease at the center of the debate over concussions in football, according to new figures from the nation’s largest brain bank focused on the study of traumatic head injury.

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