A new law for child sex offenders harkens back to a time when much less was known about human sexuality

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Julian Savulescu writes ,”Middle-distance runner Caster Semenya will need to take hormone-lowering agents, or have surgery, if she wishes to continue her career in her chosen athletic events… This ruling is flawed. On the basis of science and ethical reasoning, there are ten reasons CAS’s decision does not stand up.”

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For years, Sharissa Derricott, 30, had no idea why her body seemed to be failing. At 21, a surgeon replaced her deteriorated jaw joint. She’s been diagnosed with degenerative disc disease and fibromyalgia,.. None of it made sense to her until she discovered a community of women online who describe similar symptoms and have one thing in common: All had taken a drug called Lupron

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Puberty is no picnic, even in the best of circumstances. Once the sex hormones estrogen or testosterone kick in, there’s no turning back: Here come breasts and periods, Adam’s apples and acne. It’s a tough passage for many kids, but for some — transgender youth whose bodies don’t match their gender identity — puberty can be unbearable

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The line-up of athletes along a start line will vary in a multitude of ways, including height, weight, age and proportion. This variation is part of sporting culture — but this hasn’t always been the case when it comes to the hormone testosterone

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Despite decades of promising research, the many men who want their own contraceptive pill still have nothing. One of them, Andy Extance, looks at the obstacles – practical, political, economic – and meets the people hoping to make male birth control a reality

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Africa will mark one year without polio on Tuesday. The last case was in Somalia in 2014. But last week, a polio vaccination campaign in Kenya faced an unlikely opponent: The country’s Conference of Catholic Bishops declared a boycott of the World Health Organization’s vaccination campaign, saying they needed to “test” whether ingredients contain a derivative of estrogen

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