The Court of Arbitration for Sport says a week-long hearing for South African athlete Caster Semenya’s appeal against hormone regulations proposed by the international track and field body ended Friday. A decision in the “pivotal” case is expected in late March.

The Swiss-based court says the hearing ended with Semenya, the two-time Olympic 800-meter champion, having the “last word.”

IAAF president Sebastian Coe also spoke at the hearing, which has repercussions for the future of sport and how athletes with differences in sexual development are treated.

International Association of Athletics Federations, IAAF, president Sebastian Coe leaves after a hearing of South Africa's two-time Olympic 800-meter champion runner Caster Semenya, in Lausanne, Switzerland, Monday, Feb. (Laurent Gillieron/Keystone via AP)
International Association of Athletics Federations, IAAF, president Sebastian Coe leaves after a hearing of South Africa’s two-time Olympic 800-meter champion runner Caster Semenya, in Lausanne, Switzerland, Monday, Feb. (Laurent Gillieron/Keystone via AP)

The IAAF wants Semenya and other female athletes with what it calls abnormally high natural levels of testosterone to lower those levels through medication to be eligible to compete in top events like the world championships and the Olympics in distances from 400 meters to the mile.

The regulations were due to be implemented in November last year but were suspended pending Semenya’s appeal to sport’s highest court.

CAS says the hearing “was conducted in a cordial and respectful atmosphere” despite the emotive issue and the decade-long battle between Semenya and the IAAF.

South Africa's runner Caster Semenya, current 800-meter Olympic gold medalist and world champion, arrives for the first day of her hearing at the international Court of Arbitration for Sport, CAS, in Lausanne, Switzerland, Monday, Feb. (IAAF) ruling, forcing female runners to medicate to reduce their testosterone levels for six months before racing internationally. (Laurent Gillieron/Keystone via AP)
South Africa’s runner Caster Semenya, current 800-meter Olympic gold medalist and world champion, arrives for the first day of her hearing at the international Court of Arbitration for Sport, CAS, in Lausanne, Switzerland, Monday, Feb. (IAAF) ruling, forcing female runners to medicate to reduce their testosterone levels for six months before racing internationally. (Laurent Gillieron/Keystone via AP)

Semenya’s lawyers said at the outset of the hearing that the proposed regulations would discriminate against the runner for what was a “genetic gift.”

CAS says the decision will be announced “on or before March 26.”

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South Africa's runner Caster Semenya, current 800-meter Olympic gold medalist and world champion, hugs South Afrinca's Advocate Norman Arendse, left, as they arrive for the first day of a hearing at the international Court of Arbitration for Sport, CAS, in Lausanne, Switzerland, Monday, Feb. (IAAF) ruling, forcing female runners to medicate to reduce their testosterone levels for six months before racing internationally. (Laurent Gillieron/Keystone via AP)
South Africa’s runner Caster Semenya, current 800-meter Olympic gold medalist and world champion, hugs South Afrinca’s Advocate Norman Arendse, left, as they arrive for the first day of a hearing at the international Court of Arbitration for Sport, CAS, in Lausanne, Switzerland, Monday, Feb. (IAAF) ruling, forcing female runners to medicate to reduce their testosterone levels for six months before racing internationally. (Laurent Gillieron/Keystone via AP)
South Africa's runner Caster Semenya, current 800-meter Olympic gold medalist and world champion, arrives for the first day of her hearing at the international Court of Arbitration for Sport, CAS, in Lausanne, Switzerland, Monday, Feb. (IAAF) ruling, forcing female runners to medicate to reduce their testosterone levels for six months before racing internationally. (Laurent Gillieron/Keystone via AP)
South Africa’s runner Caster Semenya, current 800-meter Olympic gold medalist and world champion, arrives for the first day of her hearing at the international Court of Arbitration for Sport, CAS, in Lausanne, Switzerland, Monday, Feb. (IAAF) ruling, forcing female runners to medicate to reduce their testosterone levels for six months before racing internationally. (Laurent Gillieron/Keystone via AP)

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