This chapter explores the implications of the rulings, and the history of sexual dimorphism in elite athletics. The history of transsexuals in elite athletics has closely followed that of Androgen Insensitivity Syndrome (AIS) women. Between 1968 and 1998, the Olympic Committee conducted various genetic "gender authentication tests" to discourage and eliminate any male imposters competing in the women's events. The admission of transsexuals into elite athletics for their elected gender, forces to recognize the inevitability of enhancements for increased athletic performance. Transsexuals may unwittingly be at the vanguard of the transhumanist movement. Since 2004, a large number of sports organizations have used the IOC policy as a basis for their own policies on transsexual participants. The first major international decision that allowed transsexuals to compete in sporting events as their self-identified gender came in 1990, when the International Association of Athletics Federation ruled that transsexuals, who had completed prepubescent sexual reassignment surgery (SRS) could compete.