女子项目进入奥运会，无疑是现代奥运历史上的一次进步。然而在接下来的30多年里，接连发生了几起令人匪夷所思、啼笑皆非的性别混淆案。1966年，性别检测正式出现在国际体育比赛中。1968年第19届墨西哥城奥运会上，国际奥委会首次对女性运动员进行了性别测试，即染色体检测。其目的就是为了消除竞赛中以假冒女性身份赢得比赛的欺骗行为，维护奥运会女子比赛的公平性。但近年来在各方面的压力下，自2000年悉尼奥运会取消了这种例行检测，女运动员不再强行被进行性别测试，但在有可疑情况存在的前提下必须进行测试。
Daha Asian Games silver medallist Santhi Soundarajan of India had failed a sex test .
At the Olympic Games in Atlanta, about 3,500 women athletes had to undergo a diagnostic procedure that most medical authorities have characterised as misleading and unnecessary: a sex test aimed at verifying that they are not males masquerading as females. The aim, obviously, is to ensure that males, with their naturally androgen-enhanced muscular strength, don't compete against females in women-only contests. But most medical experts say that the test is far more likely to bar unfairly from competition women with genetic abnormalities that confer no such advantages.
Sex testing was hardly an issue in early Olympic Games when the competitors, all men, walked naked through the gates. But doubts about the gender of participants in women's events occasionally arose after the games were opened to women in 1912.
The only well-documented case of a male impostor competing against women in the modern Olympics involved a German athlete named Hermann Ratjen, who bound up his genitals, assumed the name 'Dora' and competed in the high jump in the 1936 Olympics. The deception wasn't discovered until 1955, when Ratjen, who came fourth in the event, blamed the deception on Nazi officials.
Sex testing was introduced in competitive sports in the mid-1960s, amid rumour that some competitors in women's events were not truly female - especially two Soviet sisters who won gold medals at the 1960 and 1964 Olympics, and who abruptly retired when gender verification testing began.
The first tests, at the European Championships in 1966 and the Pan-American Games in 1967, required female competitors to undress before a panel of doctors. Other methods used during this period included manual examination or close-up scrutiny of the athlete's genital region.
When athletes complained that these tests were degrading, the IOC at the Mexico City Olympics in 1968 introduced genetic testing in the form of a sex chromatin (Barr body) analysis of cells from a buccal smear. The procedure was further modified at the Barcelona games, using the polymerase chain reaction to amplify the DNA extracted from a specimen to allow detection of a Y chromosome gene, SRY, that codes for male determination.
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