Caster Semenya will find out on Wednesday if she has won her appeal against IAAF rules to curb female runners’ high natural levels of testosterone.
The Court of Arbitration for Sport said it would announce the ruling at noon (1000 GMT) in Switzerland.
The ruling by a panel of three judges came after more than two months, following a five-day hearing in Lausanne.
Semenya, a two-time Olympics champion in the 800 meters, and South Africa’s track federation challenged the IAAF’s proposed rules for women with “differences of sexual development (DSD).”
The proposal is on hold during the case.
Track and field’s governing body believed female runners with high testosterone levels have an unfair advantage in events from 400 meters to the mile.
It wants athletes to suppress their levels by surgery or medication to be eligible for top-tier international races.
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