| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 545 | Melaine Walker | 
                                         
                                        JAM
                                     | 
                                    53.26 Q SB | 0.183 | 
| 2 | 913 | Josanne Lucas | 
                                         
                                        TTO
                                     | 
                                    53.98 Q NR | 0.190 | 
| 3 | 759 | Angela Morosanu | 
                                         
                                        ROU
                                     | 
                                    54.15 q | 0.218 | 
| 4 | 218 | Xiaoxiao Huang | 
                                         
                                        CHN
                                     | 
                                    55.40 SB | 0.178 | 
| 5 | 796 | Natalya Ivanova | 
                                         
                                        RUS
                                     | 
                                    56.08 | 0.180 | 
| 6 | 1027 | Sheena Tosta | 
                                         
                                        USA
                                     | 
                                    56.31 | 0.133 | 
| 7 | 680 | Muizat Ajoke Odumosu | 
                                         
                                        NGR
                                     | 
                                    56.80 | 0.193 | 
| 8 | 138 | Elodie Ouédraogo | 
                                         
                                        BEL
                                     | 
                                    57.58 | 0.169 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 543 | Kaliese Spencer | 
                                         
                                        JAM
                                     | 
                                    54.37 Q | 0.180 | 
| 2 | 947 | Anastasiya Rabchenyuk | 
                                         
                                        UKR
                                     | 
                                    54.49 Q SB | 0.188 | 
| 3 | 1040 | Tiffany Williams | 
                                         
                                        USA
                                     | 
                                    54.79 q | 0.167 | 
| 4 | 712 | Anna Jesien | 
                                         
                                        POL
                                     | 
                                    54.82 | 0.183 | 
| 5 | 785 | Elena Churakova | 
                                         
                                        RUS
                                     | 
                                    56.11 | 0.157 | 
| 6 | 614 | Ieva Zunda | 
                                         
                                        LAT
                                     | 
                                    56.66 | 0.209 | 
| 7 | 394 | Perri Shakes-Drayton | 
                                         
                                        GBR
                                     | 
                                    57.57 | 0.177 | 
| 678 | Amaka Ogoegbunam | 
                                         
                                        NGR
                                     | 
                                    DQ | 0.163 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 982 | Lashinda Demus | 
                                         
                                        USA
                                     | 
                                    54.25 Q | 0.162 | 
| 2 | 777 | Natalya Antyukh | 
                                         
                                        RUS
                                     | 
                                    54.86 Q | 0.176 | 
| 3 | 547 | Nickiesha Wilson | 
                                         
                                        JAM
                                     | 
                                    54.89 SB | 0.247 | 
| 4 | 283 | Zuzana HEJNOVÁ | 
                                         
                                        CZE
                                     | 
                                    54.99 | 0.149 | 
| 5 | 189 | Vania Stambolova | 
                                         
                                        BUL
                                     | 
                                    56.12 | 0.218 | 
| 6 | 380 | Eilidh Doyle | 
                                         
                                        GBR
                                     | 
                                    56.21 | 0.154 | 
| 7 | 293 | Sara Slott PETERSEN | 
                                         
                                        DEN
                                     | 
                                    56.99 | 0.171 | 
| 8 | 428 | Jonna Tilgner | 
                                         
                                        GER
                                     | 
                                    57.11 | 0.179 |