1999, the IOC dropped sex verification from their eligibility requirements,
2009, it became clear that this issue had not gone away.
2019: The Court of Arbitration in Sport, clearly set out the facts that discrimination on the basis of biological sex was a legitimate measure to protect the female class.
2021: IOC removes the requirements for compliance with testosterone levels and prioritises inclusion.
2023: IAAF implements 2.5nmol /l as the testosterone limit for the female category and excludes competitors who have been through male puberty. Swimming, Cycling, Rugby and others, follow. FIFA do not.
2023: IOC ceases the recognition of IBA. The Paris Boxing Unit does not require athletes to reach a determined maximum level of testosterone not does it refer to male puberty when describing eligibility to participate in the female category. It refers to legal gender.
2024: IOC directs journalists to avoid questioning gender or sex traits or publicly explore the details of any individual athlete.
2024: 4 competitors who have previously been excluded from other international competitions on the basis of their biological sex have been cleared by their respective sporting organisations and the IOC to participate in the female class. 2 in boxing, 2 in football.