| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Natalya Nazarova |  RUS | 52.98 Q | 0.022 | 
| 2 | Justine Bayigga |  UGA | 53.23 Q | 0.029 | 
| 3 | Rosemary Hayward |  AUS | 53.90 Q | 0.017 | 
| 4 | Estie Wittstock |  RSA | 54.18 q | 0.015 | 
| 5 | Carey Marshall |  GBR | 54.28 q PB | 0.014 | 
| 6 | Aleksandra Pieluzek |  POL | 54.69 | 0.032 | 
| 7 | Lotte Visschers |  NED | 55.72 | 0.013 | 
| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Nakiya Johnson |  USA | 53.07 Q | 0.016 | 
| 2 | Alina Râpanu |  ROU | 53.36 Q | 0.024 | 
| 3 | Zulia Calatayud |  CUB | 54.00 Q | 0.028 | 
| 4 | Svetlana Pospelova |  RUS | 54.80 | 0.016 | 
| 5 | Jenny Marshall |  AUS | 54.88 | 0.018 | 
| 6 | Sashanie Simpson |  JAM | 54.96 | 0.024 | 
| 7 | Lucy-Ann Richards |  BAR | 55.29 | 0.051 | 
| Avikali Kainoko |  FIJ | DNS | 
| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Kristina Perica |  CRO | 53.89 Q | 0.035 | 
| 2 | Naleya Downer |  JAM | 53.94 Q | 0.039 | 
| 3 | Alexia Oberstolz |  ITA | 54.48 Q | 0.031 | 
| 4 | Katerina Glosova |  CZE | 54.53 q | 0.026 | 
| 5 | Hazel Regis-Buckels |  GRN | 55.55 | 0.031 | 
| 6 | Oksana Luneva |  KGZ | 57.54 | 0.032 | 
| Yulian Li |  CHN | DNS | 
| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Yudalis DÃaz |  CUB | 52.74 Q | 0.015 | 
| 2 | Mikele Barber |  USA | 53.86 Q | 0.030 | 
| 3 | Martina Morawská |  CZE | 54.13 Q | 0.015 | 
| 4 | Kristin Gotz |  GER | 54.27 | 0.028 | 
| 5 | Minling Lu |  CHN | 55.35 | 0.030 | 
| 6 | Yolandé Neethling |  RSA | 56.28 | 0.015 | 
| 7 | Diala El Chab |  LBN | 58.92 | 0.017 | 
| 8 | Mariama Diaby |  GUI | 59.06 | 0.021 |