| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|---|
| 1 | 1 | 3 | 3321 | Deedee Trotter |
USA |
49.87 Q SB |
| 2 | 2 | 3 | 2213 | Novlene Williams-Mills |
JAM |
49.91 q |
| 3 | 1 | 1 | 3313 | Sanya Richards-Ross |
USA |
50.07 Q |
| 4 | 1 | 2 | 1214 | Amantle MONTSHO |
BOT |
50.15 Q |
| 5 | 2 | 2 | 3307 | Francena McCorory |
USA |
50.19 Q |
| 6 | 2 | 1 | 1866 | Christine Ohuruogu |
GBR |
50.22 Q SB |
| 7 | 3 | 1 | 2209 | Rosemarie Whyte |
JAM |
50.98 q |
| 8 | 3 | 2 | 2154 | Libania Grenot |
ITA |
51.18 |
| 9 | 4 | 2 | 2195 | Christine Day |
JAM |
51.19 |
| 10 | 5 | 2 | 2581 | Regina George |
NGR |
51.35 |
| 11 | 6 | 2 | 3172 | Alina LOHVYNENKO |
UKR |
51.38 |
| 12 | 3 | 3 | 2585 | Omolara OGUNMAKINJU |
NGR |
51.41 |
| 12 | 4 | 3 | 3182 | Nataliia Pygyda |
UKR |
51.41 |
| 14 | 4 | 1 | 2104 | Joanne Cuddihy |
IRL |
51.88 |
| 15 | 5 | 3 | 2750 | Carol RodrÃguez |
PUR |
52.08 |
| 16 | 6 | 3 | 1864 | Lee McConnell |
GBR |
52.24 |
| 17 | 7 | 3 | 2030 | Marlena Wesh |
HAI |
52.49 |
| 18 | 5 | 1 | 2536 | Tjipekapora Herunga |
NAM |
52.53 |
| 19 | 7 | 2 | 1851 | Shana Cox |
GBR |
52.58 |
| 19 | 8 | 2 | 2026 | Aliann Pompey |
GUY |
52.58 |
| 21 | 6 | 1 | 1313 | Jenna Martin |
CAN |
52.83 |
| 22 | 7 | 1 | 2343 | Joy Nakhumicha Sakari |
KEN |
52.95 |
| 1 | 2862 | Yuliya Gushchina |
RUS |
DQ | ||
| 3 | 2873 | Antonina Krivoshapka |
RUS |
DQ |