Gender testing at the Olympic Games

Aiming to create a fair competition, the IOC has introduced gender testing of some form since 1968, primarily to prevent men from competing in the women's events. As they have discovered over time, there is not always a clear boundary between the two.

Gender testing was first introduced at the Olympics in 1968, for the Winter Games in Grenoble. These tests were compulsory for female athletes, possibly due to fears that male athletes would pose as female athletes and have an unfair advantage over their competitors. However, most cases of men competing as females have been unintentional.

One of the most famous cases, and the earliest, is of Polish athlete Stanisława Walasiewicz (also known as Stella Walsh), who won gold in the women's 100 m at the 1932 Summer Olympics in LA, and silver in the 100 m at the 1936 Olympics. After she was shot dead during an armed robbery in 1980, the subsequent autopsy revealed she possessed male body parts, although she also had female characteristics as well.

spiro graphicThe first athlete to actually fail a gender test was another Polish athlete Ewa Kłobukowska. In Tokyo 1964 he won gold in the women's 4x100 m relay and was third in the women's 100 m. In 1967 she was found to have a rare genetic condition (XX/XXY mosaicism) which gave her no advantage over other athletes, but was still banned from competing in Olympic and professional sports.

At the 1976 Summer Olympics, it has been reported that the only female competitor not to have to submit to a sex test was Princess Anne of the UK, who was competing as a member of the UK equestrian team. As the daughter Queen Elizabeth II, such a test was seen as inappropriate. As someone has pointed out, do they really need to test the equestrian riders, as the men and women compete against each other.

At the 1996 Atlanta Olympics eight athletes failed the gender verification tests but were all subsequently cleared by physical examinations.

Mandatory gender testing was officially stopped by the International Olympic Committee in 1999, though there can be evaluation of individual athletes if there is any question regarding gender identity.

Under current IOC rules, transsexuals (those who have had a sex change from male to female) can compete in women's events at the Olympics as long they wait two years after the operation and are undergoing hormone therapy.

Women's 800m runner Caster Semenya from South Africa was required to undergo gender tests after winning the 2009 World Championships in her first international competition. After a period of nearly a year out of competition, she was eventually cleared to compete in London 2012 where she won a silver medal in the women’s 800 meters. In that race she seemed to run a poor tactical race, and was accused by some of holding back so not to win and cause further controversy.

The IAAF have guidelines for gender verification adopted in April 2011 (largely in response to the issues with Semenya), in which female athletes now have to fall below a certain threshold of testosterone. For many female athletes the new eligibility criteria means compulsory hormonal therapy.

For the 2012 Games, officials have implemented a test of testosterone levels. However, unlike past tests which were given to all competitors in women's events, this test will be administered only when the chief medical officer of a national Olympic committee or a member of the IOC's medical commission requests it. The new rules disqualify athletes from women's events if they have testosterone levels in the normal male range, which is 7 to 30 nanomoles per liter in the blood. The top range for women is just below 3 nanomoles per liter. Athletes with complete androgen insensitivity will be allowed to compete.

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