| POS | Rank | Heat | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|
| 3 | 3 | Hazel Regis-Buckels |
GRN |
51.66 Q | |
| 1 | 6 | Sanya Richards-Ross |
USA |
50.11 Q | |
| 6 | 4 | Svetlana Bodritskaya |
KAZ |
53.35 | |
| 5 | 1 | Hortense Bewouda |
CMR |
52.11 | |
| 5 | 2 | Maria Laura Almirão |
BRA |
52.10 | |
| 4 | 5 | Mireille Nguimgo |
CMR |
51.90 q | |
| 3 | 5 | Antonina Yefremova |
UKR |
51.53 Q | |
| 1 | 3 | Natalya Nazarova |
RUS |
50.82 Q | |
| 2 | 6 | Christine Amertil |
BAH |
50.23 Q PB | |
| 4 | 2 | Nadia Davy |
JAM |
52.04 | |
| 7 | 1 | Ruwida El Hubti |
LBA |
1:03.57 NR | |
| 4 | 4 | Aliann Pompey |
GUY |
51.33 q | |
| 5 | 6 | Geisa Aparecida COUTINHO |
BRA |
52.18 | |
| 7 | 4 | Shifana Ali |
MDV |
1:00.92 NR | |
| 1 | 2 | Monique Hennagan |
USA |
51.02 Q | |
| 5 | 5 | Allison Beckford |
JAM |
52.85 | |
| 7 | 3 | Zamira Amirova |
UZB |
54.43 | |
| 3 | 1 | Grazyna Prokopek |
POL |
51.29 Q PB | |
| 2 | 1 | Lee McConnell |
GBR |
51.19 Q | |
| 4 | 3 | Estie Wittstock |
RSA |
51.89 q | |
| 2 | 5 | Sviatlana Usovich |
BLR |
51.37 Q | |
| 6 | 6 | Makelesi Batimala |
FIJ |
53.58 | |
| 7 | 2 | Fanfang Bu |
CHN |
56.01 | |
| 2 | 4 | Deedee Trotter |
USA |
50.56 Q | |
| 6 | 2 | Kirsi Mykkänen |
FIN |
52.53 | |
| 5 | 3 | Amy Mbacke Thiam |
SEN |
52.44 | |
| 7 | 5 | K.V.Damayanthi Dharsha |
SRI |
54.58 | |
| 6 | 1 | Oksana Luneva |
KGZ |
52.94 | |
| 7 | 6 | Salamtou Hassane |
NIG |
1:03.28 NR | |
| 3 | 4 | Novlene Williams-Mills |
JAM |
50.59 Q PB | |
| 3 | 6 | Christine Ohuruogu |
GBR |
50.50 Q PB | |
| 1 | 4 | Natalya Antyukh |
RUS |
50.54 Q | |
| 3 | 2 | Kaltouma Nadjina |
CHA |
51.50 Q | |
| 2 | 3 | Donna Fraser |
GBR |
51.19 Q | |
| 6 | 5 | Sandrine Thiébaud-Kangni |
TOG |
52.87 | |
| 4 | 1 | Fatou Bintou Fall |
SEN |
51.87 q | |
| 1 | 5 | Tonique Williams-Darling |
BAH |
51.20 Q | |
| 1 | 1 | Ana Guevara |
MEX |
50.93 Q | |
| 6 | 3 | Amantle MONTSHO |
BOT |
53.77 NR | |
| 5 | 4 | Egle Uljas |
EST |
51.91 q NR | |
| 4 | 6 | Tiandra Ponteen |
SKN |
51.17 q | |
| 2 | 2 | Mariyana Dimitrova |
BUL |
51.29 Q |