| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 65 | Andrea Blackett |  BAR | 54.74 Q | 0.247 | 
| 2 | 211 | Daimà PernÃa |  CUB | 54.88 Q | 0.272 | 
| 3 | 496 | Judit Szekeres |  HUN | 55.04 Q SB | 0.137 | 
| 4 | 889 | Mame Tacko Diouf |  SEN | 55.30 q | 0.159 | 
| 5 | 73 | Ann Mercken |  BEL | 55.84 | 0.161 | 
| 6 | 366 | Tasha Danvers |  GBR | 56.22 | 0.145 | 
| 7 | 11 | Delfina Joaquim |  ANG | 59.34 NR | 0.375 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 657 | Nezha Bidouane |  MAR | 54.64 Q | 0.188 | 
| 2 | 566 | Debbie-Ann Parris-Thymes |  JAM | 55.35 Q | 0.232 | 
| 3 | 367 | Sinead Dudgeon |  GBR | 55.38 Q | 0.232 | 
| 4 | 1015 | Joanna Hayes |  USA | 55.38 | 0.195 | 
| 5 | 521 | Gudrún Arnardóttir |  ISL | 55.45 | 0.240 | 
| 6 | 935 | Frida Johansson-Svensson |  SWE | 55.59 SB | 0.138 | 
| 7 | 526 | Olga Dogadko-Bronstein |  ISR | 57.23 | 0.178 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1005 | Sandra Glover |  USA | 54.47 Q | 0.265 | 
| 2 | 982 | Tetiana Tereschuk-Antipova |  UKR | 54.61 Q | 0.217 | 
| 3 | 824 | Yekaterina Bakhvalova |  RUS | 54.65 Q PB | 0.197 | 
| 4 | 441 | Ulrike Urbansky |  GER | 54.67 q PB | 0.186 | 
| 5 | 542 | Monika Niederstatter |  ITA | 55.10 q NR | 0.186 | 
| 6 | 1064 | Mary-Estelle Kapalu |  VAN | 1:01.86 | 0.350 | 
| 136 | Karlene Haughton |  CAN | DQ | 0.343 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 557 | Deon Hemmings |  JAM | 54.27 Q | 0.172 | 
| 2 | 904 | Michelle Johnson |  USA | 54.79 Q | 0.318 | 
| 3 | 620 | Natalya Torshina-Alimzhanova |  KAZ | 54.95 Q | 0.182 | 
| 4 | 518 | Susan Smith-Walsh |  IRL | 55.06 q SB | 0.150 | 
| 5 | 380 | Keri Maddox |  GBR | 55.33 PB | 0.207 | 
| 6 | 321 | Petra Söderström |  FIN | 56.93 | 0.210 | 
| 7 | 628 | Ieva Zunda |  LAT | 57.90 | 0.178 |