A pair of female sprinters from Namibia can’t compete in the Olympics this year, even though the biologically male Laurel Hubbard can compete in weightlifting for team New Zealand.

Sprinters Christine Mboma and Beatrice Masilingi cannot compete in the 400-meter dash due to naturally high testosterone levels. World Athletics requires that for women to compete in events such as the 400-meter and one-mile runs in track, they must lower their testosterone levels to 5 nanomoles per liter.

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