Subfecundity by participation in the United Kingdom sample
| Questionnaire respondents | Non-participants n (%) | Participants n (%) | p Value | |
|---|---|---|---|---|
| Correlations are highly significant. | ||||
| Infertile periods of at least 6 months | 258 | 1 (0.8) | 8 (6.3) | 0,015 |
| Urogenital disease impairing fecundity | 258 | 3 (2.3) | 4 (3.1) | >0.05 |