Caster Semenya appeal ruling on testosterone expected Wednesday

South African runner and two-time Olympic champion Caster Semenya will find out Wednesday if she has won her appeal against IAAF rules to curb female runners' high natural levels of testosterone.

IAAF believes female runners with high levels have unfair advantage

South African middle-distance runner Caster Semenya will learn her fate Wednesday after challenging the IAAF's proposed rules for women with differences of sexual development. (Stringer/Getty Images)

Caster Semenya will find out Wednesday if she has won her appeal against IAAF rules to curb female runners' high natural levels of testosterone.

The ruling by a panel of three judges comes after more than two months following a five-day hearing in Lausanne.

Semenya, a two-time Olympic champion in the 800 metres, and South Africa's track federation challenged the IAAF's proposed rules for women with "differences of sexual development [DSD]," which are on hold during the case.

Track and field's governing body believes female runners with high testosterone levels have an unfair advantage in events from 400 metres to the mile. It wants athletes to suppress their levels by surgery or medication to be eligible for top-tier international races.