| Value | Category | Cases | |
|---|---|---|---|
| 1 | Calendar | 70 |
86.4%
|
| 2 | Body temperature | 1 |
1.2%
|
| 3 | Cervical mucus | 0 |
0%
|
| 4 | Body temp. & mucus | 5 |
6.2%
|
| 5 | No specific system | 3 |
3.7%
|
| 6 | Other | 2 |
2.5%
|