| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2017 | 
|---|---|---|---|---|---|
| 2 | 4201 | Bianca Razor |  ROU | 50.37 | 51.62 | 
| 3 | 3786 | Roxana GÓMEZ |  CUB | 51.46 | 51.46 | 
| 4 | 4144 | Patience Okon GEORGE |  NGR | 50.71 | 51.06 | 
| 5 | 3654 | Shaunae MILLER-UIBO |  BAH | 49.44 | 49.77 | 
| 6 | 4341 | Quanera HAYES |  USA | 49.72 | 49.72 | 
| 7 | 4037 | Stephenie Ann MCPHERSON |  JAM | 49.92 | 50.68 | 
| 8 | 4097 | Gunta VAIÄŒULE |  LAT | 51.37 | 51.37 | 
| 9 | 4021 | Ashley Kelly |  IVB | 51.63 | 51.63 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2017 | 
|---|---|---|---|---|---|
| 2 | 3679 | Lydia JELE |  BOT | 50.32 | 50.32 | 
| 3 | 3996 | Sheoran Nirmla |  IND | 51.28 | 51.28 | 
| 4 | 4330 | Allyson FELIX |  USA | 49.26 | 49.65 | 
| 5 | 4030 | Shericka JACKSON |  JAM | 49.83 | 50.05 | 
| 6 | 3977 | Eirini VASILEIOU |  GRE | 51.86 | 51.86 | 
| 7 | 3707 | Salwa Eid NASER |  BRN | 50.57 | 50.57 | 
| 8 | 4138 | Yinka AJAYI |  NGR | 51.30 | 51.30 | 
| 9 | 4054 | Novlene Williams-Mills |  JAM | 49.63 | 50.14 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2017 | 
|---|---|---|---|---|---|
| 2 | 4165 | Iga BAUMGART-WITAN |  POL | 51.71 | 51.71 | 
| 3 | 3960 | Ruth Sophia SPELMEYER-PREUß |  GER | 51.43 | 51.72 | 
| 4 | 4389 | Kabange Mupopo |  ZAM | 50.22 | DQ | 
| 5 | 4331 | Phyllis FRANCIS |  USA | 49.94 | 49.96 | 
| 6 | 3682 | Amantle MONTSHO |  BOT | 49.33 | 51.37 | 
| 7 | 4027 | Chrisann GORDON-POWELL |  JAM | 50.13 | 50.13 | 
| 8 | 3885 | Zoey CLARK |  GBR | 51.84 | 51.84 | 
| 9 | 4140 | Margaret Bamgbose |  NGR | 51.11 | 51.57 |