| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 32 | Vania Stambolova |  BUL | 51.04 Q | 0.351 | 
| 2 | 155 | Novlene Williams-Mills |  JAM | 51.57 Q PB | 0.254 | 
| 3 | 17 | Ilona Usovich |  BLR | 51.71 q PB | 0.237 | 
| 4 | 214 | Angela Morosanu |  ROU | 52.49 q PB | 0.173 | 
| 69 | Alissa Kallinikou |  CYP | DNS | 0.000 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 234 | Natalya Nazarova |  RUS | 51.77 Q | 0.247 | 
| 2 | 33 | Mariyana Dimitrova |  BUL | 52.07 Q PB | 0.203 | 
| 3 | 193 | Monika Bejnar |  POL | 52.36 q NR | 0.205 | 
| 4 | 60 | Danijela Grgic |  CRO | 52.91 PB | 0.228 | 
| 5 | 1 | Klodiana Shala |  ALB | 54.21 | 0.178 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 229 | Olesya Krasnomovets |  RUS | 51.18 Q | 0.213 | 
| 2 | 114 | Claudia Hoffmann |  GER | 53.05 Q | 0.201 | 
| 3 | 306 | Mary Wineberg |  USA | 53.07 | 0.169 | 
| 4 | 153 | Ronetta Smith |  JAM | 53.57 | 0.172 | 
| 5 | 274 | Sandrine Thiébaud-Kangni |  TOG | 53.83 SB | 0.162 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 317 | Sanya Richards-Ross |  USA | 52.25 Q | 0.222 | 
| 2 | 7 | Christine Amertil |  BAH | 52.33 Q | 0.187 | 
| 3 | 196 | Grazyna Prokopek |  POL | 52.89 q SB | 0.167 | 
| 4 | 127 | Aliann Pompey |  GUY | 53.72 | 0.222 |