| Final 21:50 | Team | Time | L | | 1. Ana Guevara |  MEX | 48.89s | 3 | | 2. Lorraine Fenton |  JAM | 49.43s | 5 | | 3. Amy Mbacke Thiam |  SEN | 49.95s | 6 | | 4. Natalya Nazarova |  RUS | 49.98s | 7 | | 5. Tonique Williams-Darling |  BAH | 50.38s | 4 | | 6. Olesya Zykina | RUS | 50.59s | 8 | | 7. Lee McConnell |  GBR | 51.07s | 1 | | 8. Svetlana Pospelova | RUS | 51.30s | 2 |
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| Heat 1 20.30h | Time | Team | L | | 1. Amy Mbacke Thiam | SEN | 50.78s | 6 | | 2. Svetlana Pospelova | RUS | 50.84s | 4 | | 3. Lee McConnell | GBR | 51.06s | 8 | | 4. Sanya Richards |  USA | 51.32s | 3 | | 5. Olabisi Afolabi |  NGR | 51.38s | 5 | | 6. Ronetta Smith | JAM | 51.39s | 7 | | 7. Heide Seyerling |  RSA | 51.89s | 2 | | 8. Hazel-Ann Regis |  GRN | 51.95s | 1 |
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| Heat 2 20.37h | Time | Team | L | | 1. Tonique Williams-Darling | BAH | 50.43s | 5 | | 2. Lorraine Fenton | JAM | 50.45s | 6 | | 3. Olesya Zykina | RUS | 50.96s | 3 | | 4. Demetria Washington | USA | 51.31s | 2 | | 5. DeeDee Trotter | USA | 51.68s | 7 | | 6. Grazyna Prokopek |  POL | 51.89s | 4 | | 7. Makelesi Bulikiobo |  FIJ | 52.27s | 1 | | 8. Antonina Yefremova |  UKR | 53.19s | 8 |
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| Heat 3 20.44h | Time | Team | L | | 1. Ana Guevara | MEX | 50.68s | 6 | | 2. Natalya Nazarova | RUS | 50.92s | 4 | | 3. Mireille Nguimgo |  CMR | 51.19s | 8 | | 4. Svetlana Usovich |  BLR | 51.46s | 3 | | 5. Sandie Richards | JAM | 51.80s | 2 | | 6. Christine Amertil | BAH | 51.85s | 5 | | 7. Anna Tkach |  ISR | 52.25s | 7 | | 8. Karen Shinkins |  IRL | 52.74s | 1 |
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| Heat 1 11.20h | Time | Team | L | | 1. Ana Guevara | MEX | 51.14s | 3 | | 2. Svetlana Usovich | BLR | 51.39s | 4 | | 3. Olabisi Afolabi | NGR | 51.47s | 8 | | 4. Mireille Nguimgo | CMR | 51.65s | 6 | | 5. Karen Shinkins | IRL | 52.06s | 5 | | 6. Sandrine Thiebaud-Kangni |  TOG | 52.50s | 7 | | 7. Geisa Aparecida Coutinho |  BRA | 53.31s | 2 |
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| Heat 2 11.26h | Time | Team | L | | 1. Natalya Nazarova | RUS | 51.09s | 6 | | 2. Christine Amertil | BAH | 51.72s | 8 | | 3. Sandie Richards | JAM | 51.86s | 3 | | 4. Antonina Yefremova | UKR | 51.91s | 7 | | 5. Anna Tkach | ISR | 52.06s | 4 | | 6. DeeDee Trotter | USA | 52.17s | 2 | | 7. Irisca Kithouka |  CGO | 1:00.04 | 5 |
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| Heat 3 11.32h | Time | Team | L | | 1. Tonique Williams-Darling | BAH | 51.24s | 7 | | 2. Olesya Zykina | RUS | 51.32s | 8 | | 3. Demetria Washington | USA | 51.53s | 1 | | 4. Hazel-Ann Regis | GRN | 51.97s | 4 | | 5. Hrisoula Goudenoudi |  GRE | 52.33s | 6 | | 6. Solen Desert |  FRA | 52.41s | 5 | | 7. Aida Torosyan |  ARM | 58.02s | 2 | | 8. Kuan HoiWai |  MAC | 1:00.75s | 3 |
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| Heat 4 11.38h | Time | Team | L | | 1. Lorraine Fenton | JAM | 50.90s | 5 | | 2. Svetlana Pospelova | RUS | 51.00s | 6 | | 3. Lee McConnell | GBR | 51.67s | 7 | | 4. Makelesi Bulikiobo | FIJ | 52.01s | 3 | | 5. Aliann Pompey |  GUY | 52.21s | 2 | | 6. Bintou FallFatou | SEN | 52.35s | 4 | | 7. Eliana Pacheco |  VEN | 54.32s | 8 |
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| Heat 5 11.44h | Time | Team | L | | 1. Amy Mbacke Thiam | SEN | 50.86s | 4 | | 2. Sanya Richards | USA | 51.00s | 7 | | 3. Grazyna Prokopek | POL | 51.36s | 6 | | 4. Ronetta Smith | JAM | 51.62s | 5 | | 5. Heide Seyerling | RSA | 52.18s | 1 | | 6. Claudia Marx |  GER | 52.30s | 2 | | 7. Lilian Bwalya |  ZAM | 56.84s | 3 | | 8. Shifana Ali |  MDV | 1:01.74 | 8 |
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