| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 590 | Novlene Williams-Mills |
JAM
|
49.66 Q SB | 0.206 |
| 2 | 677 | Ana Guevara |
MEX
|
50.19 Q SB | 0.213 |
| 3 | 259 | Ilona Usovich |
BLR
|
50.31 q NR | 0.182 |
| 4 | 556 | Joanne Cuddihy |
IRL
|
50.73 NR | 0.167 |
| 5 | 473 | Lee McConnell |
GBR
|
51.07 SB | 0.217 |
| 6 | 362 | Indira Terrero |
CUB
|
51.08 | 0.164 |
| 7 | 968 | Natasha Hastings |
USA
|
51.45 | 0.163 |
| 8 | 609 | Asami Chiba |
JPN
|
51.81 SB | 0.199 |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 474 | Nicola Sanders |
GBR
|
49.77 Q PB | 0.174 |
| 2 | 793 | Natalya Antyukh |
RUS
|
49.93 Q SB | 0.190 |
| 3 | 1003 | Deedee Trotter |
USA
|
50.31 q | 0.179 |
| 4 | 592 | Shericka Williams |
JAM
|
50.37 SB | 0.181 |
| 5 | 229 | Christine Amertil |
BAH
|
51.18 | 0.209 |
| 6 | 570 | Daniela Reina |
ITA
|
51.99 SB | 0.198 |
| 7 | 542 | Barbara Petráhn |
HUN
|
52.12 | 0.195 |
| 8 | 535 | Aliann Pompey |
GUY
|
53.58 | 0.193 |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 477 | Christine Ohuruogu |
GBR
|
50.16 Q PB | 0.200 |
| 2 | 1006 | Mary Wineberg |
USA
|
50.27 Q | 0.185 |
| 3 | 839 | Tatyana Veshkurova |
RUS
|
50.71 | 0.172 |
| 4 | 267 | Amantle MONTSHO |
BOT
|
50.90 NR | 0.242 |
| 5 | 589 | Shereefa Lloyd |
JAM
|
51.00 PB | 0.179 |
| 6 | 703 | Christy Ekpukhon Ihunaegbo |
NGR
|
51.60 | 0.184 |
| 7 | 779 | Ionela Târlea |
ROU
|
51.62 | 0.152 |
| 8 | 360 | Aymeé MartÃnez |
CUB
|
57.77 | 0.321 |