100 metres at the Olympics 40 in 2000 and reached the Olympic semi-finals four years later. (Ottey is also the most frequent participant having competed in the Olympic 100 m an unrivalled six times from 1984 to 2004). The first women's champion, Betty Robinson in 1928, remains the youngest gold medallist for the event at 16 years old, while a 32-year-old Linford Christie became the oldest 100 m Olympic champion in 1992. Since introduction of testing by the IAAF in the early-20th century, female sprinters may be subject to gender verification. This rule was first formally applied to the 100 m at the 1968 Mexico
100 metres at the Olympics Cuthbert (1956), Wilma Rudolph (1960), and Florence Griffith-Joyner (1988). Fanny Blankers-Koen is the only one of these women to win four gold medals at the same games by winning the 80 metres hurdles in 1948. Two of the highest profile doping scandals have involved the Olympic 100 m competition: Ben Johnson won the 1988 Olympic 100 m title in a world record time of 9.79 seconds but was later stripped of the titles after failing a drug test. Marion Jones was the 2000 women's Olympic 100 m gold medallist but had her results annulled after admitting to using performance-enhancing drugs