| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 595 | Brandi Cross | 
                                         
                                        USA
                                     | 
                                    53.43 Q | 0.161 | 
| 2 | 159 | Aymeé MartÃnez | 
                                         
                                        CUB
                                     | 
                                    53.73 Q | 0.256 | 
| 3 | 146 | Maria Alejandra Idrobo | 
                                         
                                        COL
                                     | 
                                    54.41 Q PB | 0.190 | 
| 4 | 521 | Anna Verkhovskaya | 
                                         
                                        RUS
                                     | 
                                    54.91 Q | 0.198 | 
| 5 | 310 | Shakeeri Cole | 
                                         
                                        JAM
                                     | 
                                    55.49 | 0.205 | 
| 6 | 503 | Eugenie Wicksell | 
                                         
                                        RSA
                                     | 
                                    55.99 | 0.198 | 
| 7 | 544 | Anja Puc | 
                                         
                                        SLO
                                     | 
                                    56.47 | 0.218 | 
| 8 | 328 | Ruriko Kubo | 
                                         
                                        JPN
                                     | 
                                    57.11 | 0.206 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 549 | Nawal El Jack | 
                                         
                                        SUD
                                     | 
                                    51.83 Q CR | 0.210 | 
| 2 | 153 | Danijela Grgic | 
                                         
                                        CRO
                                     | 
                                    52.91 Q PB | 0.217 | 
| 3 | 589 | Olha Myhaylychenko | 
                                         
                                        UKR
                                     | 
                                    53.93 Q | 0.198 | 
| 4 | 317 | Bobby-Gaye Wilkins-Gooden | 
                                         
                                        JAM
                                     | 
                                    54.07 Q PB | 0.172 | 
| 5 | 52 | Jaimee-Lee Starr | 
                                         
                                        AUS
                                     | 
                                    54.17 SB | 0.181 | 
| 6 | 520 | Nadezda Sozontova | 
                                         
                                        RUS
                                     | 
                                    54.86 | 0.168 | 
| 7 | 110 | Deanna Sullivan | 
                                         
                                        CAN
                                     | 
                                    55.61 | 0.215 | 
| 8 | 459 | Tina Polak Matusinska | 
                                         
                                        POL
                                     | 
                                    57.86 | 0.162 |