Final 21:05 | Team | time | L | | React. | bib | 1. Amantle Montsho | BOT | 49.56s | 4 | NR | 0.327 | 163 | 2. Allyson Felix | USA | 49.59s | 3 | PB | 0.163 | 935 | 3. Anastasiya Kapachinskaya | RUS | 50.24s | 6 | | 0.261 | 760 | 4. Francena McCorory | USA | 50.45s | 5 | | 0.340 | 959 | 5. Antonina Krivoshapka | RUS | 50.66s | 2 | | 0.211 | 768 | 6. Shericka Williams | JAM | 50.79s | 7 | | 0.352 | 531 | 7. Sanya Richards-Ross | USA | 51.32s | 1 | | 0.160 | 972 | 8. Novlene Williams-Mills | JAM | 52.89s | 8 | | 0.304 | 532 |
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Semi 1. 18:55 | Team | time | L | | React. | Rk. | bib | 1. Allyson Felix | USA | 50.36s | 3 | | 0.164 | 3. | 935 | 2. Novlene Williams-Mills | JAM | 50.48s | 6 | | 0.364 | 6. | 532 | 3. Antonina Krivoshapka | RUS | 50.55s | 4 | | 0.214 | 7. | 768 | 4. Nataliya Pyhyda | UKR | 51.61s | 5 | | 0.157 | 12. | 892 | 5. Moa Hjelmer | SWE | 52.35s | 7 | | 0.208 | 18. | 832 | 6. Nicola Sanders | GBR | 52.47s | 1 | | 0.187 | 19. | 407 | 7. Maris Maegi | EST | 53.27s | 2 | | 0.324 | 21. | 332 | 8. Fantu Magiso | ETH | 53.41s | 8 | | 0.387 | 23. | 351 |
Semi 2. 19:03 | Team | time | L | | React. | Rk. | bib | 1. Francena McCorory | USA | 50.24s | 6 | PB | 0.210 | 2. | 959 | 2. Shericka Williams | JAM | 50.46s | 5 | SB | 0.216 | 5. | 531 | 3. Sanya Richards-Ross | USA | 50.66s | 4 | | 0.209 | 8. | 972 | 4. Antonina Yefremova | UKR | 50.88s | 3 | | 0.164 | 9. | 910 | 5. Marta Milani | ITA | 51.86s | 7 | PB | 0.181 | 13. | 503 | 6. Geisa Aparecida Coutinho | BRA | 51.87s | 2 | | 0.183 | 14. | 166 | 7. Lee McConnell | GBR | 51.97s | 8 | | 0.256 | 15. | 395 | 8. Norma Gonzalez | COL | 52.29s | 1 | | 0.193 | 17. | 258 |
Semi 3. 19:11 | Team | time | L | | React. | Rk. | bib | 1. Amantle Montsho | BOT | 50.13s | 4 | | 0.368 | 1. | 163 | 2. Anastasiya Kapachinskaya | RUS | 50.41s | 5 | | 0.228 | 4. | 760 | 3. Rosemarie Whyte | JAM | 50.90s | 3 | | 0.204 | 10. | 529 | 4. Jessica Beard | USA | 51.27s | 8 | | 0.267 | 11. | 920 | 5. Ndeye Fatou Soumah | SEN | 52.10s | 7 | | 0.300 | 16. | 795 | 6. Denisa Rosolova | CZE | 52.53s | 1 | | 0.166 | 20. | 300 | 7. Racheal Nachula | ZAM | 53.30s | 2 | SB | 0.209 | 22. | 1002 | -. Joanne Cuddihy | IRL | DQ | 6 | | -0.317 | | 479 |
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Heat 1. 20:05 | Team | time | L | | React. | Rk. | bib | 1. Novlene Williams-Mills | JAM | 51.30s | 8 | | 0.355 | 2. | 532 | 2. Allyson Felix | USA | 51.45s | 5 | | 0.171 | 7. | 935 | 3. Joanne Cuddihy | IRL | 51.82s | 7 | SB | 0.226 | 11. | 479 | 4. Marta Milani | ITA | 51.94s | 3 | SB | 0.161 | 12. | 503 | 5. Geisa Aparecida Coutinho | BRA | 52.15s | 1 | | 0.170 | 13. | 166 | 6. Pinar Saka | TUR | 53.59s | 2 | | 0.244 | 25. | 866 | 7. Graciela Martins | GBS | 58.22s | 6 | PB | 0.235 | 34. | 412 | 8. Sandrine Thiebaud-Kangni | TOG | 59.68s | 4 | | 0.201 | 35. | 844 |
Heat 2. 20:14 | Team | time | L | | React. | Rk. | bib | 1. Antonina Yefremova | UKR | 51.35s | 3 | | 0.161 | 3. | 910 | 2. Anastasiya Kapachinskaya | RUS | 51.43s | 7 | | 0.246 | 6. | 760 | 3. Ndeye Fatou Soumah | SEN | 52.23s | 5 | | 0.343 | 15. | 795 | 4. Jessica Beard | USA | 52.40s | 6 | | 0.337 | 18. | 920 | 5. Aliann Pompey | GUY | 53.59s | 4 | | 0.198 | 26. | 461 | 6. Tjipekapora Herunga | NAM | 54.08s | 1 | | 0.184 | 29. | 662 | 7. Alaa Hikmat Al-Qaysi | IRQ | 55.62s | 2 | | 0.285 | 32. | 485 |
Heat 3. 20:23 | Team | time | L | | React. | Rk. | bib | 1. Rosemarie Whyte | JAM | 51.38s | 8 | | 0.205 | 5. | 529 | 2. Antonina Krivoshapka | RUS | 51.52s | 3 | | 0.209 | 8. | 768 | 3. Nataliya Pyhyda | UKR | 51.67s | 4 | | 0.182 | 10. | 892 | 4. Fantu Magiso | ETH | 52.23s | 6 | | 0.449 | 16. | 351 | 5. Racheal Nachula | ZAM | 53.49s | 1 | SB | 0.164 | 24. | 1002 | 6. Daisurami Bonne | CUB | 53.69s | 7 | | 0.219 | 28. | 275 | 7. Evodie-Lydie Saramandji | CAF | 1:05.10 | 2 | SB | 0.208 | 36. | 194 | -. Christine Ohuruogu | GBR | DQ-F1 | 5 | | 0.343 | | 397 |
Heat 4. 20:32 | Team | time | L | | React. | Rk. | bib | 1. Amantle Montsho | BOT | 50.95s | 2 | | 0.425 | 1. | 163 | 2. Francena McCorory | USA | 52.18s | 3 | | 0.488 | 14. | 959 | 3. Lee McConnell | GBR | 52.75s | 5 | | 0.241 | 21. | 395 | 4. Maris Maagi | EST | 52.93s | 1 | | 0.173 | 22. | 332 | 5. Norma Gonzalez | COL | 53.35s | 4 | | 0.182 | 23. | 258 | 6. Aymee Martinez | CUB | 53.67s | 7 | | 0.319 | 27. | 283 | 7. Ambwene Simukonda | MAW | 54.81s | 6 | NR | 0.431 | 31. | 648 |
Heat 5. 20:41 | Team | time | L | | React. | Rk. | bib | 1. Sanya Richards-Ross | USA | 51.37s | 5 | | 0.181 | 4. | 972 | 2. Shericka Williams | JAM | 51.66s | 3 | | 0.197 | 9. | 531 | 3. Moa Hjelmer | SWE | 52.26s | 6 | | 0.222 | 17. | 832 | 4. Denisa Rosolova | CZE | 52.51s | 2 | | 0.238 | 19. | 300 | 5. Nicola Sanders | GBR | 52.65s | 1 | | 0.183 | 20. | 407 | 6. Kseniya Karandyuk | UKR | 54.10s | 4 | | 0.169 | 30. | 883 | 7. Betty Burua | PNG | 56.98s | 7 | | 0.252 | 33. | 700 |
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