| Value | Category | Cases | |
|---|---|---|---|
| 1 | During her period | 25 | 
                                    
                                    1.8%
                                 | 
| 2 | After period ended | 289 | 
                                    
                                    21.3%
                                 | 
| 3 | Middle of the cycle | 324 | 
                                    
                                    23.9%
                                 | 
| 4 | Before period begins | 95 | 
                                    
                                    7%
                                 | 
| 5 | At any time | 369 | 
                                    
                                    27.2%
                                 | 
| 6 | Other | 8 | 
                                    
                                    0.6%
                                 | 
| 8 | Don't know | 248 | 
                                    
                                    18.3%
                                 |