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The women's 400 metres at the 2007 World Championships in Athletics was held at the Nagai Stadium on 26, 27 and 29 August.
Contents
Heats
Qualification: First 4 in each heat (Q) and the next 4 fastest (q) advance to the semifinals.
Semifinals
First 2 in each semifinal(Q) and the next 2 fastest(q) advance to the final.
References
2007 World Championships in Athletics – Women's 400 metres Wikipedia(Text) CC BY-SA