The women's discus throw at the 2009 World Championships in Athletics was held at the Olympic Stadium on August 19 and August 21. Reigning Olympic champion Stephanie Brown Trafton was the favourite for the gold. She had set a career best and had the four longest throws of any athlete that season, although she had not competed since late June. Franka Dietzsch was another prominent performer: the 41-year-old was the defending champion and was making her 10th appearance of the tournament, but a weak season had underlined her waning powers. Cuban Yarelis Barrios looked set to build upon her World and Olympic silver medals from the last two years and Aimin Song had also performed well during the season. Veteran athletes Nicoleta Grasu and Natalya Sadova were also favoured to be among the top pe