Characteristics of the Freyja Study participants
| Characteristic | Women (n) (n=24) | Men (n) (n=6) |
| Age group (years) | ||
| 18–24 | 1 | – |
| 25–29 | 6 | – |
| 30–34 | 10 | 4 |
| 35–39 | 7 | 2 |
| 40–44 | 1 | – |
| Ethnicity | ||
| Asian/Asian British | 3 | – |
| Black African/Caribbean/British | 3 | – |
| White British | 16 | 6 |
| White non-British | 2 | – |
| Income | ||
| Really comfortable/comfortable | 15 | 4 |
| Neither comfortable or struggling | 6 | |
| Struggling | 3 | |
| Prior use of Natural Cycles for contraception | 17 | NA |
| Duration of Natural Cycles in ‘Plan’ mode (months) | ||
| <1 | 4 | NA |
| 1–6 | 13 | |
| >6 | 7 | |
| Pregnancy status at interview | ||
| Currently pregnant | 6 | NA |
| Previous pregnancy but not currently | 7 | |
| Has never been pregnant | 10 | |
| Not sure | 1 |
NA, not asked.