| Order / Lane | ATHLETE | COUNTRY | PB | SB 2012 |
|---|---|---|---|---|
| Natasha Hastings |
USA
|
49.84 | 50.72 | |
| Sanya Richards-Ross |
USA
|
48.70 | 49.28 | |
| Novlene Williams-Mills |
JAM
|
49.63 | 49.78 | |
| Shericka Williams |
JAM
|
49.32 | 50.34 | |
| Amantle MONTSHO |
BOT
|
49.54 | 49.54 | |
| Francena McCorory |
USA
|
50.06 | 50.06 | |
| Deedee Trotter |
USA
|
49.64 | 49.72 | |
| Debbie Dunn |
USA
|
49.64 | 50.78 |