| Final 21:10 | time |   | React. | bib. |  | 1. Sanya Richards-Ross |  USA | 49.55s |   | 0.189 | 3313 |  | 2. Christine Ohuruogu |  GBR | 49.70s | SB | 0.174 | 1866 |  | 3. Deedee Trotter |  USA | 49.72s | SB | 0.167 | 3321 |  | 4. Amantle Montsho |  BOT | 49.75s |   | 0.198 | 1214 |  | 5. Novlene Williams-Mills |  JAM | 50.11s |   | 0.258 | 2213 |  | 6. Antonina Krivoshapka |  RUS | 50.17s |   | 0.175 | 2873 |  | 7. Francena McCorory |  USA | 50.33s |   | 0.196 | 3307 |  | 8. Rosemarie Whyte |  JAM | 50.79s |   | 0.184 | 2209 |   
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|   - Saturday 04.08 20:05 - First 2 and Best 2 progress.  |   
| Semi 1 | time |   | React. | bib. | Rk. |  | 1. Sanya Richards-Ross |  USA | 50.07s |   | 0.149 | 3313 | 4. |  | 2. Christine Ohuruogu |  GBR | 50.22s | SB | 0.222 | 1866 | 7. |  | 3. Rosemarie Whyte |  JAM | 50.98s |   | 0.197 | 2209 | 8. |  | 4. Yulia Gushchina |  RUS | 51.66s |   | 0.166 | 2862 | 15. |  | 5. Joanne Cuddihy |  IRL | 51.88s |   | 0.209 | 2104 | 16. |  | 6. Tjipekapora Herunga |  NAM | 52.53s |   | 0.200 | 2536 | 20. |  | 7. Jenna Martin |  CAN | 52.83s |   | 0.185 | 1313 | 23. |  | 8. Joy Nakhumicha Sakari |  KEN | 52.95s |   | 0.196 | 2343 | 24. |   
| Semi 2 | time |   | React. | bib. | Rk. |  | 1. Amantle Montsho |  BOT | 50.15s |   | 0.205 | 1214 | 5. |  | 2. Francena McCorory |  USA | 50.19s |   | 0.246 | 3307 | 6. |  | 3. Libania Grenot |  ITA | 51.18s |   | 0.163 | 2154 | 9. |  | 4. Christine Day |  JAM | 51.19s |   | 0.194 | 2195 | 10. |  | 5. Regina George |  NGR | 51.35s |   | 0.151 | 2581 | 11. |  | 6. Alina Lohvynenko |  UKR | 51.38s |   | 0.194 | 3172 | 12. |  | 7. Shana Cox |  GBR | 52.58s |   | 0.185 | 1851 | 21. |  | 8. Aliann Pompey |  GUY | 52.58s |   | 0.147 | 2026 | 22. |   
| Semi 3 | time |   | React. | bib. | Rk. |  | 1. Antonina Krivoshapka |  RUS | 49.81s |   | 0.198 | 2873 | 1. |  | 2. Deedee Trotter |  USA | 49.87s | SB | 0.187 | 3321 | 2. |  | 3. Novlene Williams-Mills |  JAM | 49.91s |   | 0.247 | 2213 | 3. |  | 4. Omolara Omotosho |  NGR | 51.41s |   | 0.195 | 2585 | 13. |  | 5. Nataliya Pyhyda |  UKR | 51.41s |   | 0.176 | 3182 | 14. |  | 6. Carol Rodriguez |  PUR | 52.08s |   | 0.210 | 2750 | 17. |  | 7. Mcconnell Lee |  GBR | 52.24s |   | 0.219 | 1864 | 18. |  | 8. Marlena Wesh |  HAI | 52.49s |   | 0.251 | 2030 | 19. |   
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|   - Friday 03.08 12:00 - First 3 and Best 3 progress.  |   
| Heat 1 | time |   | React. | bib. | Rk. |  | 1. Francena McCorory |  USA | 50.78s |   | 0.299 | 3307 | 3. |  | 2. Christine Ohuruogu |  GBR | 50.80s |   | 0.282 | 1866 | 4. |  | 3. Joy Nakhumicha Sakari |  KEN | 51.85s | SB | 0.200 | 2343 | 13. |  | 4. Joanne Cuddihy |  IRL | 52.09s |   | 0.175 | 2104 | 18. |  | 5. Geisa Aparecida Coutinho |  BRA | 53.43s |   | 0.187 | 1235 | 32. |  | 6. Marina Maslenko |  KAZ | 53.66s |   | 0.192 | 2284 | 34. |  | 7. Zamzam Mohamed Farah |  SOM | 1:20.48 |   | 0.405 | 2946 | 45. |   
| Heat 2 | time |   | React. | bib. | Rk. |  | 1. Amantle Montsho |  BOT | 50.40s |   | 0.186 | 1214 | 1. |  | 2. Christine Day |  JAM | 51.05s |   | 0.178 | 2195 | 8. |  | 3. Shana Cox |  GBR | 52.01s |   | 0.181 | 1851 | 16. |  | 4. Aliann Pompey |  GUY | 52.10s | =SB | 0.174 | 2026 | 19. |  | 5. Afia Charles |  ANT | 54.25s |   | 0.180 | 1018 | 38. |  | 6. Ingrid Yahoska Narvaez |  NCA | 59.55s | =SB | 0.221 | 2540 | 42. |  | -. Shaunae Miller |  BAH | DNF |   | 0.176 | 1118 |   |   
| Heat 3 | time |   | React. | bib. | Rk. |  | 1. Deedee Trotter |  USA | 50.87s |   | 0.268 | 3321 | 5. |  | 2. Rosemarie Whyte |  JAM | 50.90s |   | 0.219 | 2209 | 7. |  | 3. Jenna Martin |  CAN | 51.98s |   | 0.174 | 1313 | 14. |  | 4. Omolara Omotosho |  NGR | 52.11s |   | 0.221 | 2585 | 20. |  | 5. Raysa Sanchez |  DOM | 52.47s |   | 0.190 | 1568 | 27. |  | 6. Aauri Lorena Bokesa |  ESP | 53.67s |   | 0.158 | 1644 | 35. |  | 7. Zourah Ali |  DJI | 1:05.37 |   | - | 1555 | 44. |   
| Heat 4 | time |   | React. | bib. | Rk. |  | 1. Sanya Richards-Ross |  USA | 51.78s |   | 0.216 | 3313 | 12. |  | 2. Carol Rodriguez |  PUR | 52.19s |   | 0.187 | 2750 | 22. |  | 3. Tjipekapora Herunga |  NAM | 52.31s |   | 0.197 | 2536 | 24. |  | 4. Pinar Saka |  TUR | 52.38s |   | 0.199 | 3100 | 25. |  | 5. Sviatlana Usovich |  BLR | 52.40s |   | 0.206 | 1205 | 26. |  | 6. Phumlile Ndzinisa |  SWZ | 53.95s |   | 0.224 | 3011 | 36. |  | 7. Hristina Risteska |  MKD | 1:00.86 |   | 0.214 | 2520 | 43. |   
| Heat 5 | time |   | React. | bib. | Rk. |  | 1. Antonina Krivoshapka |  RUS | 50.75s |   | 0.223 | 2873 | 2. |  | 2. Alina Lohvynenko |  UKR | 52.08s |   | 0.184 | 3172 | 17 |  | 3. Lee McConnell |  GBR | 52.23s |   | 0.222 | 1864 | 23. |  | 4. Moa Hjelmer |  SWE | 52.86s |   | 0.189 | 3006 | 30. |  | 5. Ambwene Simukonda |  MAW | 54.20s | NR | 0.241 | 2481 | 37. |  | 6. Danielle Alakija |  FIJ | 56.77s |   | 0.289 | 1717 | 39. |  | -. Kanika Beckles |  GRN | DNSs |   | - | 2008 |   |   
| Heat 6 | time |   | React. | bib. | Rk. |  | 1. Novlene Williams-Mills |  JAM | 50.88s |   | 0.269 | 2213 | 6. |  | 2. Nataliya Pyhyda |  UKR | 51.09s | PB | 0.190 | 3182 | 9. |  | 3. Libania Grenot |  ITA | 52.13s |   | 0.205 | 2154 | 21. |  | 4. Joelma Sousa |  BRA | 52.69s |   | 0.182 | 1249 | 28. |  | 5. Bianca Razor |  ROU | 52.83s |   | 0.195 | 2772 | 29. |  | 6. Maziah Mahusin |  BRU | 59.28s | NR | 0.194 | 1263 | 41. |  | -. Kineke Alexander |  VIN | DNF |   | 0.206 | 3361 |   |   
| Heat 7 | time |   | React. | bib. | Rk. |  | 1. Regina George |  NGR | 51.24s |   | 0.175 | 2581 | 10. |  | 2. Yulia Gushchina |  RUS | 51.54s |   | 0.190 | 2862 | 11. |  | 3. Marlena Wesh |  HAI | 51.98s |   | 0.192 | 2030 | 14. |  | 4. Amy Mbacke Thiam |  SEN | 53.23s |   | 0.227 | 2913 | 31. |  | 5. Olesea Cojuhari |  MDA | 53.64s |   | 0.183 | 2488 | 33. |  | 6. Graciela Martins |  GBS | 58.30s |   | 0.237 | 1883 | 40. |  | -. Jennifer Padilla |  COL | DQ 163.3a | 0.187 | 1440 |   |   
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