| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 273 | Stephenie Ann MCPHERSON | 
                                         
                                        JAM
                                     | 
                                    51.26 Q SB | 0.137 | 
| 2 | 300 | Femke BOL | 
                                         
                                        NED
                                     | 
                                    51.28 Q | 0.222 | 
| 3 | 233 | Aliyah ABRAMS | 
                                         
                                        GUY
                                     | 
                                    51.57 Q AIR | 0.164 | 
| 4 | 319 | Natalia KACZMAREK | 
                                         
                                        POL
                                     | 
                                    51.87 | 0.180 | 
| 5 | 150 | Roxana GÓMEZ | 
                                         
                                        CUB
                                     | 
                                    52.28 | 0.164 | 
| 6 | 215 | Ama PIPI | 
                                         
                                        GBR
                                     | 
                                    52.95 | 0.166 | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 12.45 | 
                                             
                                            
                                                Stephenie AnnMCPHERSON  | 
                                    
                                         
                                        JAM
                                     | 
                                
| 200 m | 23.98 | 
                                             
                                            
                                                Stephenie AnnMCPHERSON  | 
                                    
                                         
                                        JAM
                                     | 
                                
| 300 m | 37.05 | 
                                             
                                            
                                                Stephenie AnnMCPHERSON  | 
                                    
                                         
                                        JAM
                                     | 
                                
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 110 | Shaunae MILLER-UIBO | 
                                         
                                        BAH
                                     | 
                                    51.38 Q SB | 0.139 | 
| 2 | 323 | Justyna ŚWIĘTY-ERSETIC | 
                                         
                                        POL
                                     | 
                                    51.67 Q | 0.185 | 
| 3 | 303 | Lieke KLAVER | 
                                         
                                        NED
                                     | 
                                    51.81 Q | 0.159 | 
| 4 | 208 | Jessie KNIGHT | 
                                         
                                        GBR
                                     | 
                                    51.93 SB | 0.156 | 
| 5 | 291 | Modesta JustÄ— MORAUSKAITÄ– | 
                                         
                                        LTU
                                     | 
                                    52.00 | 0.170 | 
| 6 | 245 | Phil HEALY | 
                                         
                                        IRL
                                     | 
                                    52.40 | 0.160 | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 12.10 | 
                                             
                                            
                                                ShaunaeMILLER-UIBO  | 
                                    
                                         
                                        BAH
                                     | 
                                
| 200 m | 23.79 | 
                                             
                                            
                                                ShaunaeMILLER-UIBO  | 
                                    
                                         
                                        BAH
                                     | 
                                
| 300 m | 37.11 | 
                                             
                                            
                                                ShaunaeMILLER-UIBO  | 
                                    
                                         
                                        BAH
                                     |