How Many Sexes Are There?

The issue of gender verification is not new to competitive sports. Yet how can we define biological sex? And how many sexes are there? As the 2016 Rio Olympic Games get underway, CNRS News explores this sensitive and complicated topic.

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Age groups including division into sexes, n(%).

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Biological sex is binary, even though there is a rainbow of sex

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How many genders are there originally? Historically, most

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