| 1 | Sandie Richards | JAM | 51,98 | Q |
| 2 | Olesya Zykina | RUS | 52,18 | Q |
| 3 | Monique Hennagan | USA | 52,43 | Q |
| 4 | Catherine Murphy | GBR | 52,45 | |
| 5 | Ionela Tirlea | ROM | 52,87 | |
| 6 | Foy Williams | CAN | 53,61 |
| 1 | Olga Kotlyarova | RUS | 51,63 | Q |
| 2 | Suziann Reid | USA | 51,84 | Q |
| 3 | Nadjina Kaltouma | CHA | 51,92 | Q |
| 4 | Shanta Ghosh | GER | 51,93 | |
| 5 | Aliann Pompey | GUY | 53,18 | |
| 6 | Natalya Sologub | BLR | 53,60 |