| Final 18:40 | Team | time | L | | React. | bib | | 1. Sanya Richards-Ross | USA | 50.79s | 6 | | 0.244 | 818 | | 2. Aleksandra Fedoriva | RUS | 51.76s | 3 | | 0.279 | 724 | | 3. Natasha Hastings | USA | 51.82s | 5 | | 0.226 | 806 | | 4. Vania Stambolova | BUL | 51.99s | 2 | | 0.288 | 546 | | 5. Shana Cox | GBR | 52.13s | 4 | PB | 0.187 | 596 | | 6. Denisa Rosolová | CZE | 52.48s | 1 | | 0.301 | 574 |
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| Semi 1 19:50 | Team | time | L | | React. | bib | | 1. Natasha Hastings | USA | 51.87s | 6 | | 0.357 | 806 | | 2. Vania Stambolova | BUL | 51.87s | 4 | | 0.329 | 546 | | 3. Nataliya Pyhyda | UKR | 51.98s | 5 | SB | 0.298 | 784 | | 4. Moa Hjelmer | SWE | 52.29s | 3 | NR | 0.259 | 757 | | 5. Muizat Ajoke Odumosu | NGR | 54.06s | 2 | | 0.291 | 690 | | -. Aliann Pompey | GUY | DNF | 1 | | 0.230 | 624 |
| Semi 2 19:56 | Team | time | L | | React. | bib | | 1. Shana Cox | GBR | 52.69s | 6 | | 0.325 | 596 | | 2. Denisa Rosolová | CZE | 52.78s | 5 | | 0.355 | 574 | | 3. Dominique Blake | JAM | 53.00s | 4 | | 0.410 | 645 | | 4. Irina Davydova | RUS | 53.02s | 3 | | 0.318 | 723 | | 5. Maria Enrica Spacca | ITA | 53.71s | 2 | | 0.270 | 641 | | -. Tiandra Ponteen | SKN | DNF | 1 | | 0.365 | 747 |
| Semi 3 20:02 | Team | time | L | | React. | bib | | 1. Sanya Richards-Ross | USA | 50.99s | 5 | | 0.305 | 818 | | 2. Aleksandra Fedoriva | RUS | 51.79s | 6 | | 0.369 | 724 | | 3. Patricia Hall | JAM | 53.21s | 4 | | 0.337 | 648 | | 4. Nadine Okyere | GBR | 53.66s | 3 | | 0.264 | 601 | | 5. Bimbo Miel Ayedou | BEN | 54.26s | 1 | SB | 0.424 | 515 | | 6. Meliz Redif | TUR | 54.48s | 2 | | 0.367 | 771 |
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| Heat 1 09:35 | Team | time | L | | React. | bib | | 1. Denisa Rosolová | CZE | 52.95s | 5 | | 0.323 | 574 | | 2. Vania Stambolova | BUL | 52.97s | 6 | | 0.412 | 546 | | 3. Maria Enrica Spacca | ITA | 53.74s | 4 | | 0.243 | 641 | | 4. Rodríguez Déborah | URU | 57.08s | 2 | | 0.227 | 795 | | 5. Sharon Kwarula | PNG | 59.56s | 3 | | 0.975 | 699 |
| Heat 2 09:40 | Team | time | L | | React. | bib | | 1. Nataliya Pyhyda | UKR | 52.02s | 6 | SB | 0.243 | 784 | | 2. Patricia Hall | JAM | 52.99s | 5 | | 0.347 | 648 | | 3. Meliz Redif | TUR | 53.55s | 4 | | 0.410 | 771 | | 4. Amaliya Sharoyan | ARM | 56.41s | 3 | | 0.334 | 505 | | 5. Danielle Alakija | FIJ | 1:00.00 | 1 | PB | 0.389 | 588 | | 6. Amy Atkinson | GUM | 1:05.99 | 2 | NR | 0.399 | 623 |
| Heat 3 09:45 | Team | time | L | | React. | bib | | 1. Sanya Richards-Ross | USA | 52.81s | 5 | | 0.243 | 818 | | 2. Nadine Okyere | GBR | 53.56s | 6 | | 0.405 | 601 | | 3. Tiandra Ponteen | SKN | 53.74s | 4 | | 0.415 | 747 | | 4. Bimbo Miel Ayedou | BEN | 54.44s | 2 | NR | 0.341 | 515 | | -. Geisa Aparecida Coutinho | BRA | DQ | 3 | | 0.295 | 535 |
| Heat 4 09:50 | Team | time | L | | React. | bib | | 1. Aleksandra Fedoriva | RUS | 53.26s | 5 | | 0.346 | 724 | | 2. Dominique Blake | JAM | 53.39s | 6 | | 0.362 | 645 | | 3. Muizat Ajoke Odumosu | NGR | 53.47s | 4 | | 0.306 | 690 | | 4. Natacha Ngoye | CGO | 58.21s | 2 | PB | 0.428 | 550 | | -. Munguntuya Batgerel | MGL | DQ | 3 | | 0.289 | 678 |
| Heat 5 09:55 | Team | time | L | | React. | bib | | 1. Natasha Hastings | USA | 53.64s | 5 | | 0.266 | 806 | | 2. Moa Hjelmer | SWE | 54.01s | 6 | | 0.224 | 757 | | 3. Aliann Pompey | GUY | 54.63s | 4 | | 0.337 | 624 | | 4. Graciela Martins | GBS | 59.83s | 3 | | 0.312 | 609 | | 5. Vladislava Ovcharenko | TJK | 1:00.33 | 2 | NR | 0.467 | 761 |
| Heat 6 10:00 | Team | time | L | | React. | bib | | 1. Shana Cox | GBR | 53.24s | 6 | | 0.286 | 596 | | 2. Irina Davydova | RUS | 53.58s | 5 | | 0.351 | 723 | | 3. Ambwene Simukonda | MAW | 55.51s | 3 | | 0.384 | 676 | | 4. Kineke Alexander | VIN | 55.88s | 4 | | 0.393 | 835 | | 5. Gaiane Ustiane | GEO | 1:01.38 | 1 | PB | 0.415 | 610 | | 6. Maziah Mahusin | BRU | 1:03.69 | 2 | NR | 0.224 | 540 |
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