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China's Ye Shiwen gestures after competing in a women's 200-meter individual medley swimming semifinal at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, July 30, 2012. The gold medalist holds the world's record for the 400-meter individual medley.
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Ye Shiwen of China celebrates with her gold medal during the Medal Ceremony for the women's 400-meter individual medley on July 28, 2012, in London. Yi's performance at the games has led to speculation about the possible use of performance-enhancing drugs. China has denied this.
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From left, silver medalist Elizabeth Beisel of the U.S., gold medalist Ye Shiwen of China and bronze medalist Xuanxu Li of China celebrate during the Medal Ceremony for the women's 400-meter individual medley at the London 2012 Olympic Games on July 28, 2012.
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China's Ye Shiwen swims in her semifinal of the women's 200-meter individual medley at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, July 30, 2012.
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China's Ye Shiwen reacts after winning the women's 400-meter individual medley final swimming event at the London 2012 Olympic Games on July 28, 2012, in London.
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China's Ye Shiwen competes in the women's 200- meter individual medley semi-final swimming event at the London 2012 Olympic Games on July 30, 2012, in London.
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Ye Shiwen, left, and Xuanxu Li of China react after Ye set a world record as she won the final of the women's 400-meter individual medley at the London 2012 Olympic Games on July 28, 2012.
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Gold medalist China's Ye Shiwen,center, poses with silver medalist Australia's Alicia Coutts, left, and bronze medalist Ariana Kukors of the U.S. on the podium during the award ceremony for the final of the women's 200-meter individual medley swimming event in the FINA World Championships in Shanghai on July 25, 2011.
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Gold medalist Ye Shiwen of China poses for a photo with her her country's flag following the medal ceremony for the Women's 200-meter individual medley final at the 14th FINA World Championships at the Oriental Sports Center on July 25, 2011, in Shanghai.
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In a picture taken with an underwater camera, China's Ye Shiwen competes in the heats of the women's 400-metre individual medley swimming event in the FINA World Championships at the indoor stadium of the Oriental Sports Center in Shanghai on July 31, 2011.
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Stephanie Rice of Australia looks on with Ye Shiwen of China after their women's 200-meter individual medley heat during the 14th FINA World Championships at the Oriental Sports Center on July 24, 2011, in Shanghai, China.
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Spanish swimmer Mireia Belmonte,center, holds her gold medal as she stands on the podium with silver medalist Ye Shiwen of China, right, and her bronze-winning compatriot Li Xuanxu during the medal ceremony for the women's 400-meter individual medley at the FINA World Short Course Championships in Dubai on Dec. 15, 2010.
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Ye Shiwen of China fixes her jacket after getting her gold medal on the podium during the award ceremony for the women's 200-meter individual medley in the swimming event of the 16th Asian Games in Guangzhou on Nov. 18, 2010. Ye won gold, Wang Qun of China won silver and Choi Hye Ra of South Korea won bronze.
