| Final 20:11 | team | team | +time | L |   |  | 1. Shiwen Ye |  CHN | 4:28.43 | WR | 5 |  Stats |  | 2. Elizabeth Beisel |  USA | 4:31.27 | +2.84s | 4 |  Stats |  | 3. Xuanxu Li |  CHN | 4:32.91 | +4.48s | 6 |  Stats |  | 4. Katinka Hosszu |  HUN | 4:33.49 | +5.06s | 3 |  Stats |  | 5. Hannah Miley |  GBR | 4:34.17 | +5.74s | 7 |  Stats |  | 6. Stephanie Rice |  AUS | 4:35.49 | +7.06s | 1 |  Stats |  | 6. Caitlin Leverenz |  USA | 4:35.49 | +7.06s | 8 |  Stats |  | 8. Mireia Belmonte Garcia |  ESP | 4:35.62 | +7.19s | 2 |  Stats |   
| Last 25m Split of Shin Ye 28.93s better than Ryan Lochte 29.10s in Men 400m Medley! |   
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| Heat 5 | time | +time | L | Rk. |   |  | 1. Elizabeth Beisel |  USA | 4:31.68 |   | 04 | 1. |  Stats |  | 2. Xuanxu Li |  CHN | 4:34.28 | +2.60s | 05 | 4. |  Stats |  | 3. Mireia Belmonte Garcia |  ESP | 4:34.70 | +3.02s | 03 | 5. |  Stats |  | 4. Anja Klinar |  SLO | 4:38.20 | +6.52s | 01 | 10. |  Stats |  | 5. Aimee Willmott |  GBR | 4:38.87 | +7.19s | 02 | 11. |  Stats |  | 6. Blair Evans |  AUS | 4:40.42 | +8.74s | 06 | 13. |  Stats |  | 7. Lara Grangeon |  FRA | 4:44.28 | +12.60s | 07 | 18. |  Stats |  | -. Joanna Melo |  BRA | DNS | 08 |   |   |   
| Heat 4 | time | +time | L | Rk. |   |  | 1. Hannah Miley |  GBR | 4:34.98 |   | 04 | 6. |  Stats |  | 2. Stephanie Rice |  AUS | 4:35.76 | +0.78s | 05 | 7. |  Stats |  | 3. Caitlin Leverenz |  USA | 4:36.09 | +1.11s | 03 | 8. |  Stats |  | 4. Miyu Otsuka |  JPN | 4:39.13 | +4.15s | 06 | 12. |  Stats |  | 5. Stina Gardell |  SWE | 4:41.66 | +6.68s | 07 | 14. |  Stats |  | 6. Katheryn Meaklim |  RSA | 4:43.46 | +8.48s | 02 | 16. |  Stats |  | 7. Stefania Pirozzi |  ITA | 4:45.61 | +10.63s | 01 | 22. |  Stats |  | 8. Jordis Steinegger |  AUT | 4:45.80 | +10.82s | 08 | 23. |  Stats |   
| Heat 3 | time | +time | L | Rk. |   |  | 1. Shiwen Ye |  CHN | 4:31.73 |   | 05 | 2. |  Stats |  | 2. Katinka Hosszu |  HUN | 4:33.77 | +2.04s | 04 | 3. |  Stats |  | 3. Zsuzsanna Jakabos |  HUN | 4:37.37 | +5.64s | 03 | 9. |  Stats |  | 4. Barbora Zavadova |  CZE | 4:41.84 | +10.11s | 06 | 15. |  Stats |  | 5. Natalie Wiegersma |  NZL | 4:44.78 | +13.05s | 08 | 19. |  Stats |  | 6. Miho Takahashi |  JPN | 4:45.10 | +13.37s | 02 | 20. |  Stats |  | 7. Yana Martynova |  RUS | 4:45.94 | +14.21s | 07 | 24. |  Stats |  | 8. Claudia Dasca Romeu |  ESP | 4:46.80 | +15.07s | 01 | 25. |  Stats |   
| Heat 2 | time | +time | L | Rk. |   |  | 1. Seoyeong Kim |  KOR | 4:43.99 |   | 05 | 17. |  Stats |  | 2. Stephanie Horner |  CAN | 4:45.49 | +1.50s | 04 | 21. |  Stats |  | 3. Ganna Dzerkal |  UKR | 4:48.19 | +4.20s | 07 | 26. |  Stats |  | 4. Andreina Pinto Perez |  VEN | 4:48.64 | +4.65s | 06 | 27. |  Stats |  | 5. Sara Nordenstam |  NOR | 4:51.28 | +7.29s | 08 | 30. |  Stats |  | 6. Karolina Szczepaniak |  POL | 4:52.50 | +8.51s | 01 | 31. |  Stats |  | 7. Sara El Bekri |  MAR | 4:53.21 | +9.22s | 02 | 32. |  Stats |  | 8. Georgina Bardach |  ARG | 4:57.31 | +13.32s | 03 | 34. |  Stats |   
                 | Heat 1 | time | +time | L | Rk. |   |  | 1. Thi Anh Vien Nguyen |  VIE | 4:50.32 |   | 03 | 28. |  Stats |  | 2. Susana Escobar Torres |  MEX | 4:50.57 | +0.25s | 04 | 29. |  Stats |  | 3. Noora Laukkanen |  FIN | 4:53.54 | +3.22s | 05 | 33. |  Stats |  | 4. Anum Bandey |  PAK | 5:34.64 | +44.32s | 06 | 35. |  Stats |   
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|   | F |  | Heat 5 | 3 |  | Heat 4 | 3 |  | Heat 3 | 2 |  | Heat 2  |  | Heat 1  |   
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| Total eligible to participate 36 swimmers |   
|  Olympic Qualifying Time - 4:41.75 - 14+10 |  | Stephanie Rice | AUS | 6. | Blair Evans | AUS | 13. |  | Li Xuanxu | CHN | 3. | Ye Shiwen | CHN | 1. |  | Aimee Willmott | GBR | 11. | Hannah Miley | GBR | 5. |  | Katinka Hosszú | HUN | 4. | Zsuzsanna Jakabos | HUN | 9. |  | Miyu Otsuka | JPN | 12. | Miho Takahashi | JPN | 20. |  | Mireia Belmonte García | ESP | 8. | Claudia Dasca | ESP | 25. |  | Elizabeth Beisel | USA | 2. | Caitlin Leverenz | USA | 6. |  | Jördis Steinegger | AUT | 23. |  | Joanna Maranhão | BRA | DNS |  | Barbora Zavadova | CZE | 15. |  | Lara Grangeon | FRA | 18. |  | Stefania Pirozzi | ITA | 22. |  | Natalie Wiegersma | NZL | 19. |  | Yana Martynova | RUS | 24. |  | Anja Klinar | SLO | 10. |  | Kathryn Meaklim | RSA | 16. |  | Stina Gardell | SWE | 14. |   
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|  Olympic Selection Time - 4:51.75 - 11 |  | Stephanie Horner | CAN | 4:42.25 | 21.  |  | Grainne Murphy | IRL | qoe | DNS |  | Sara Nordenstam | NOR | 4:46.29 | 30. |  | Kim Seo-Yeong | KOR | 4:46.56 | 17.  |  | Georgina Bardach | ARG | 4:46.83 | 34. |  | Sara El Bekri | MAR | qoe | 32. |  | Ganna Dzerkal | UKR | 4:48.17 | 26.  |  | Karolina Szczepaniak | POL | 4:48.59 | 31. |  | Susana Escobar | MEX | 4:49.95 | 29. |  | Noora Laukkanen | FIN | 4:50.08 | 33. |  | Nguyen Thi Anh Vien | VIE | 4:50.27 | 28. |  | Andreina Pinto Perez | VEN |   | 27. |   
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| Universality Places - 1 |  | Anum Bandey | PAK | 35. |   
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| Olympic Qualification time | time | place | date | birth |  | 1. Elizabeth Beisel | USA | 4:31.74 | Omaha(USA) | 25.06.2012 | 18/08/1992 |  | 2. Hannah Miley | GBR | 4:32.67 | London(GBR) | 03.03.2012 | 08/08/1989 |  | 3. Katinka Hosszu | HUN | 4:32.83 | Indianapolis(USA) | 29.03.2012 | 03/05/1989 |  | 4. Xuanxu Li | CHN | 4:33.34 | Nanchang(CHN) | 17.10.2011 | 05/02/1994 |  | 5. Stephanie Rice | AUS | 4:33.45 | Adelaide(AUS) | 15.03.2012 | 17/06/1988 |  | 6. Shiwen Ye | CHN | 4:33.66 | Nanchang(CHN) | 17.10.2011 | 01/03/1996 |  | 7. Mireia Belmonte Garcia | ESP | 4:33.91 | Malaga(ESP) | 29.03.2012 | 10/11/1990 |  | 8. Caitlin Leverenz | USA | 4:34.48 | Omaha(USA) | 25.06.2012 | 26/02/1991 |  | 9. Zsuzsanna Jakabos | HUN | 4:35.68 | Debrecen(HUN) | 21.05.2012 | 03/04/1989 |  | 10.Blair Evans | AUS | 4:36.21 | Adelaide(AUS) | 27.01.2012 | 03/04/1991 |  | 11.Miyu Otsuka | JPN | 4:36.64 | Tokyo(JPN) | 02.04.2012 | 19/07/1994 |  | 12.Barbora Zavadova | CZE | 4:36.96 | Shanghai(CHN) | 24.07.2011 | 23/01/1993 |  | 13.Aimee Willmott | GBR | 4:37.48 | London(GBR) | 03.03.2012 | 26/02/1993 |  | 14.Kathryn Meaklim | RSA | 4:37.70 | Durban(RSA) | 16.04.2012 | 20/07/1989 |  | 15.Miho Takahashi | JPN | 4:37.71 | Tokyo(JPN) | 02.04.2012 | 01/12/1992 |  | 16.Lara Grangeon | FRA | 4:38.28 | Strasburg(FRA) | 23.03.2011 | 21/09/1991 |  | 17.Stina Gardell | SWE | 4:38.46 | Debrecen(HUN) | 21.05.2012 | 28/03/1990 |  | 18.Yana Martynova | RUS | 4:38.69 | Moscow(RUS) | 17.04.2012 | 03/02/1988 |  | 19.Anja Klinar | SLO | 4:39.90 | Kranj(SLO) | 02.06.2011 | 03/04/1988 |  | 20.Stefania Pirozzi | ITA | 4:40.48 | Roma(ITA) | 17.06.2011 | 16/12/1993 |  | 21.Claudia Dasca Romeu | ESP | 4:40.75 | Malaga(ESP) | 29.03.2012 | 04/11/1994 |  | 22.Joanna Melo Maranhao | BRA | 4:40.79 | Rio de Janeiro(BRA) | 15.12.2011 | 29/04/1987 |  | 23.Joerdis Steinegger | AUT | 4:41.33 | Shanghai(CHN) | 24.07.2011 | 08/02/1983 |  | 24.Natalie Wiegersma | NZL | 4:41.74 | Auckland(NZL) | 25.03.2012 | 07/01/1990 |   
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