| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 132 | Novlene Williams-Mills |
JAM
|
51.77 Q SB | 0.422 |
| 2 | 111 | Aliann Pompey |
GUY
|
52.29 Q | 0.191 |
| 3 | 4 | Christine Amertil |
BAH
|
52.36 SB | 0.167 |
| 4 | 275 | Deedee Trotter |
USA
|
52.55 | 0.235 |
| 5 | 64 | Maris Mägi |
EST
|
53.30 | 0.418 |
| 191 | Tatyana Firova |
RUS
|
DQ | 0.239 |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 258 | Debbie Dunn |
USA
|
52.08 Q | 0.234 |
| 2 | 23 | Vania Stambolova |
BUL
|
52.30 Q | 0.290 |
| 3 | 15 | Amantle MONTSHO |
BOT
|
52.34 Q NR | 0.286 |
| 4 | 201 | Natalya Nazarova |
RUS
|
52.47 | 0.183 |
| 5 | 47 | Denisa Rosolová |
CZE
|
52.92 | 0.183 |
| 134 | Bobby-Gaye Wilkins-Gooden |
JAM
|
DQ | 0.274 |