There is a group of female athletes banned from participating in official sports competitions because they have above average natural testosterone levels. Considered by some as a sign of intolerance, prejudice and lack of empathy, this standard has prematurely ended the career of dozens of athletes and threatens the journey of several world class runners including the three women who won medals in the 800m competition in Rio 2016 Olympic Games: Francine Niyonsaba from Burundi, Margaret Wambui from Kenya and the twice Olympic champion Caster Semenya. One of the top names in the world’s track and field competitions, Caster is banned by the World Athletics (WA), former International Association of Athletics Federations (IAAF), from defending her title in Tokyo 2020. The Federation says she will only be able to compete if she takes hormone suppressants to lower her testosterone levels. Male athletes are not limited by a natural testosterone level to compete.