| Final 20:35 | time | | L | React. | ______ | | 1. United States | 41.56s | WL | 4 | 0.179 | | | Bianca Knight, Allyson Felix, Marshevet Myers, Carmelita Jeter | | 2. Jamaica | 41.70s | NR | 6 | 0.207 | | | Shelly-Ann Fraser-Pryce, Kerron Stewart, Sherone Simpson, Veronica Campbell-Brown | | 3. Ukraine | 42.51s | SB | 8 | 0.171 | | | Olesya Povh, Nataliya Pohrebnyak, Mariya Ryemyen, Hrystyna Stuy | | 4. Trinidad Tobago | 42.58s | | 3 | 0.175 | | | Kai Selvon, Kelly-Ann Baptiste, Semoy Hackett, Michelle-Lee Ahye | | 5. France | 42.70s | | 5 | 0.190 | | | Myriam Soumare, Celine Distel, Lina Jacques-Sebastien, Veronique Mang | | 6. Russia | 42.93s | | 1 | 0.169 | | | Yulia Gushchina, Natalia Rusakova, Elizabeta Savlinis, Aleksandra Fedoriva | | 7. Nigeria | 42.93s | | 7 | 0.163 | | | Gloria Asumnu, Oludamola Osayomi, Agnes Osazuwa, Blessing Okagbare | | 8. Brazil | 43.10s | | 2 | 0.187 | | | Ana Claudia Silva, Vanda Gomes, Franciela Krasucki, Rosângela Santos |
| Heats - Saturday 03.09 - First 2 and Best 2 progress. |
| Heat 1 18:30 | time | | L | React. | Rk. | __________ | | 1. Jamaica | 42.23s | WL | 2 | 0.172 | 2. | | | Shelly-Ann Fraser - Pryce, Kerron Stewart, Sherone Simpson, Jura Levy | | 2. France | 42.60s | SB | 4 | 0.191 | 4. | | | Myriam Soumare, Celine Distel, Lina Jacques-Sebastien, Veronique Mang | | 3. Brazil | 42.92s | AR | 3 | 0.157 | 8. | | | Ana Claudia Silva, Vanda Gomes, Franciela Krasucki, Rosângela Santos | | 4. Colombia | 43.53s | SB | 1 | 0.157 | 10. | | Yomara Hinestroza, Maria Alejandra Idrobo, Darlenis Obregón, Norma González | | 5. Japan | 43.83s | | 6 | 0.177 | 12. | | | Nao Okabe, Momoko Takahashi, Chisato Fukushima, Saori Imai | | 6. Spain | 46.24 | | 5 | 0.196 | 17. | | | Placida Martinez, Amparo Cotán, Concepcion Montaner, Ruth Beitia | | -. China | DQ | | 7 | 0.049 | | | | Yongli Wei, Qiuping Liang, Lan Jiang, Yujia Tao |
| Heat 2 18:38 | time | | L | React. | Rk. | __________ | | 1. Trinidad Tobago | 42.50s | NR | 2 | 0.150 | 3. | | | Kai Selvon, Kelly-Ann Baptiste, Semoy Hackett, Michelle-Lee Ahye | | 2. Ukraine | 42.63s | SB | 7 | 0.159 | 5. | | | Olesya Povh, Nataliya Pohrebnyak, Mariya Ryemyen, Hrystyna Stuy | | 3. Russia | 42.78s | SB | 5 | 0.157 | 7. | | | Yulia Gushchina, Natalia Rusakova, Elizabeta Savlinis, Aleksandra Fedoriva | | 4. Australia | 43.79s | | 6 | 0.194 | 11. | | | Hayley Butler, Melissa Breen, Charlotte Van Veenendaal, Sally Pearson | | 5. Great Britain | 43.95s | | 4 | 0.161 | 13. | | | Tiffany Porter, Anyika Onuora, Laura Turner, Jeanette Kwakye | | 6. South Korea | 46.14s | SB | 1 | 0.138 | 16. | | | Jeesu Eum, So-Yeon Kim, Sunae Lee, So-Yeun Park | | -. Poland | DNF | | 3 | 0.161 | | | | Anna Kielbasinska, Marika Popowicz, Marta Jeschke, Agnieszka Ligieza |
| Heat 3 18:46 | time | | L | React. | Rk. | __________ | | 1. United States | 41.94s | WL | 1 | 0.162 | 1. | | | Bianca Knight, Shalonda Solomon, Marshevet Myers, Alexandria Anderson | | 2. Nigeria | 42.74s | SB | 4 | 0.155 | 6. | | | Gloria Asumnu, Oludamola Osayomi, Agnes Osazuwa, Blessing Okagbare | | 3. Netherlands | 43.44s | NR | 7 | 0.209 | 9. | | | Kadene Vassell, Dafne Schippers, Anouk Hagen, Jamile Samuel | | 4. Switzerland | 44.04s | | 5 | 0.149 | 14. | | | Clelia Reuse, Jacqueline Gasser, Ellen Sprunger, Léa Sprunger | | 5. Belarus | 44.38s | | 3 | 0.164 | 15. | | | Hanna Bahdanovich, Yuliya Balykina, Alena Neumiarzhitskaya, Hanna Liapeshka | | 6. Bahamas | 50.62s | | 3 | 0.207 | 18. | | | Sheniqua Ferguson, Nivea Smith, Anthonique Strachan, Debbie Ferguson-McKenzie | | -. Germany | DNF | | 6 | 0.197 | | | | Yasmin Kwadwo, Anne Mollinger, Cathleen Tschirch, Marion Wagner |
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