| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 557 | Deon Hemmings |  JAM | 54.00 Q | 0.189 | 
| 2 | 65 | Andrea Blackett |  BAR | 54.18 Q | 0.144 | 
| 3 | 982 | Tetiana Tereschuk-Antipova |  UKR | 54.55 Q | 0.182 | 
| 4 | 904 | Michelle Johnson |  USA | 54.67 q | 0.188 | 
| 5 | 889 | Mame Tacko Diouf |  SEN | 55.17 | 0.218 | 
| 6 | 367 | Sinead Dudgeon |  GBR | 55.69 | 0.173 | 
| 7 | 824 | Yekaterina Bakhvalova |  RUS | 55.76 | 0.151 | 
| 8 | 441 | Ulrike Urbansky |  GER | 55.81 | 0.239 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 657 | Nezha Bidouane |  MAR | 53.95 Q | 0.166 | 
| 2 | 211 | Daimà PernÃa |  CUB | 53.96 Q | 0.197 | 
| 3 | 1005 | Sandra Glover |  USA | 54.17 Q | 0.151 | 
| 4 | 566 | Debbie-Ann Parris-Thymes |  JAM | 54.81 q | 0.155 | 
| 5 | 496 | Judit Szekeres |  HUN | 54.86 SB | 0.182 | 
| 6 | 518 | Susan Smith-Walsh |  IRL | 55.20 | 0.176 | 
| 7 | 620 | Natalya Torshina-Alimzhanova |  KAZ | 55.26 | 0.256 | 
| 8 | 542 | Monika Niederstatter |  ITA | 55.57 | 0.214 |