Running sensation Caster Semenya of South Africa and other female runners will probably have to reduce their body’s natural topterone level under new rules to continue to compete in top international races.

According to Huffing Post “The new rules issued Thursday by the International Association of Athletics Federations set strict limits on testosterone levels for women and “intersex” athletes in women’s races. They represent a continuing struggle over how to create fair competition amid increased sensitivity and understanding about what constitutes gender in the “binary” sports establishment. ”

Just as the rules were announced, a leading IAAF scientist said he predicts a third “intersex” category could be established in the next five to 10 years in international competition.