4 Top Athletes Barred From Their Events Over Hormone Rules

• Caster Semenya, Aminatou Seyni, Margaret Wambui, and Francine Niyonsaba have been barred from competing in their preferred Olympic event because of their natural testosterone levels.
• World Athletics passed hormone regulations in 2018.
• The rules say intersex women must lower their natural testosterone levels with medication in order to compete. 

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World Athletics