Ewa Klobukowska (b. 1946), a former Polish sprinter and the first Olympic athlete to fail a gender test, pictured here in 1967. She won the gold medal in the women's 4x100 m relay and the bronze medal in the women's 100 m sprint at the 1964 Summer Olympics in Tokyo. In 1965 in Prague, she set a world record in the 100 m sprint with the time 11.1 s. In 1966 at the European Athletics Championships in Budapest, she won two gold medals in the 100 m sprint and the 4x100 m relay and the silver medal in the 200 m sprint. Klobukowska failed a traditional gender test at the European Cup women's track and field competition in Kiev in 1967 and was subsequently banned from competing in professional sports. According to the IAAF she had "one chromosome too many." Medical publications revealed that Klobukowska is a genetic mosaic of XX/XXY.