| Final 20:45 | time | L | | 1. Amy Mbacke Thiam |  SEN | 49.86s | 4 | | 2. Lorraine Fenton |  JAM | 49.88s | 7 | | 3. Ana Guevara |  MEX | 49.97s | 3 | | 4. Grit Breuer |  GER | 50.49s | 5 | | 5. Kaltouma Nadjina |  CHA | 50.80s | 6 | | 6. Olesya Zykina |  RUS | 50.93s | 2 | | 7. Mireille Nguimgo |  CMR | 51.97s | 1 | | -. Falilat Ogunkoya |  NGR | DNF | 8 |
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| Semi 1 17.10h | time | L | | 1. Grit Breuer | GER | 50.32s | 5 | | 2. Olesya Zykina | RUS | 50.59s | 3 | | 3. Mireille Nguimgo | CMR | 50.71s | 6 | | 4. Demetria Washington |  USA | 51.26s | 4 | | 5. Karen Shinkins |  IRL | 51.66s | 2 | | 6. K.V.Damayanthi Dharsha |  SRI | 51.83s | 8 | | 7. Grazyna Prokopek |  POL | 52.28s | 1 | | -. Natalya Sologub |  BLR | DQ | 7 |
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| Semi 2 17.17h | time | L | | 1. Amy Mbacke Thiam | SEN | 50.21s | 4 | | 2. Kaltouma Nadjina | CHA | 50.38s | 5 | | 3. Falilat Ogunkoya | NGR | 50.50s | 6 | | 4. Heide Seyerling |  RSA | 50.87s | 8 | | 5. Monique Hennagan | USA | 50.98s | 3 | | 6. Sandie Richards | JAM | 51.40s | 1 | | 7. Claudia Marx | GER | 51.75s | 7 | | 8. K. Mathews Beenamol |  IND | 52.68s | 2 |
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| Semi 3 17.24h | time | L | | 1. Ana Guevara | MEX | 50.58s | 4 | | 2. Lorraine Fenton | JAM | 50.61s | 6 | | 3. Michelle Collins | USA | 51.22s | 5 | | 4. Florence Ekpo-Umoh | GER | 51.47s | 8 | | 5. Anastasiya Kapachinskaya | RUS | 51.68s | 3 | | 6. Donna Fraser |  GBR | 51.77s | 2 | | 7. Aliann Pompey |  GUY | 51.96s | 1 | | 8. Anna Kozak | BLR | 52.13s | 7 |
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| Heat 1 9.50h | time | L | | 1. Kaltouma Nadjina | CHA | 51.24s | 6 | | 2. Demetria Washington | USA | 51.50s | 8 | | 3. Sandie Richards | JAM | 51.71s | 4 | | 4. Natalya Sologub | BLR | 51.78s | 2 | | 5. Zana Minina |  LTU | 52.98s | 1 | | 6. Greta Taslakian |  LIB | 57.06s | 5 | | -. Alena Petrova |  TKM | DQ | 7 | | -. Sandrine Kangni |  TOG | DNS | 3 |
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| Heat 2 9.56h | time | L | | 1. Michelle Collins | USA | 51.26s | 6 | | 2. Lorraine Fenton | JAM | 51.80s | 8 | | 3. Claudia Marx | GER | 52.03s | 5 | | 4. Otilia Ruicu |  ROM | 52.33s | 2 | | 5. Foy Williams |  CAN | 52.92s | 1 | | 6. MariadoCarmo Tavares |  POR | 54.08s | 7 | | 7. Gladys Mateyo |  ZAM | 59.30s | 3 | | -. Verica Dimitrovska |  MKD | DQ | 4 |
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| Heat 3 10.02h | time | L | | 1. Olesya Zykina | RUS | 51.56s | 4 | | 2. Falilat Ogunkoya | NGR | 51.79s | 6 | | 3. Anna Kozak | BLR | 52.35s | 1 | | 4. Catherine Murphy | GBR | 52.40s | 5 | | 5. Francine Landre |  FRA | 52.57s | 8 | | 6. Christine Amertil |  BAH | 53.07s | 2 | | 7. Julia Alba |  ESP | 54.73s | 3 | | 8. Mereoni Raluve |  FIJ | 58.03s | 7 |
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| Heat 4 10.08h | time | L | | 1. Ana Guevara | MEX | 50.99s | 6 | | 2. Anastasiya Kapachinskaya | RUS | 51.12s | 4 | | 3. Florence Ekpo-Umoh | GER | 51.77s | 1 | | 4. Grazyna Prokopek | POL | 51.92s | 5 | | 5. K.Mathews Beenamol | IND | 52.17s | 7 | | 6. Nova Peris |  AUS | 53.55s | 3 | | 7. Tsvetelina Kirilova |  BUL | 54.82s | 2 | | -. Odonsuren Oyuntuya |  MGL | DNS | 8 |
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| Heat 5 10.14h | time | L | | 1. Grit Breuer | GER | 50.71s | 8 | | 2. Monique Hennagan | USA | 51.12s | 5 | | 3. Karen Shinkins | IRL | 51.37s | 7 | | 4. Donna Fraser | GBR | 52.02s | 3 | | 5. Aliann Pompey | GUY | 52.20s | 2 | | 6. Jane Arnott |  NZL | 52.57s | 4 | | 7. Natalya Antyukh | RUS | 52.71s | 6 |
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| Heat 6 10.20h | time | L | | 1. Amy Mbacke Thiam | SEN | 50.99s | 7 | | 2. Mireille Nguimgo | CMR | 51.09s | 5 | | 3. Heide Seyerling | RSA | 51.78s | 2 | | 4. K.V.Damayanthi Dharsha | SRI | 52.21s | 3 | | 5. LaDonna Antoine | CAN | 52.38s | 6 | | 6. Allison Beckford | JAM | 53.08s | 1 | | 7. Jitka Burianova |  CZE | 53.29s | 4 | | -. Klodiana Shala |  ALB | DQ | 8 |
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