Time taken to conceive the most recent child* (n (%)) by semen study participation in England
| Workers | 0–3 months | 4–13 months | >13 months | Fecundability ratio | 95% CI | |
|---|---|---|---|---|---|---|
| *Children conceived after contraceptive failure (n=19) and men not able to recall time to pregnancy (n=29) were excluded. | ||||||
| Non-participants | 113 | 70 (62) | 34 (30) | 9 (8) | 1 | – |
| Participants | 116 | 81 (70) | 25 (22) | 10 (9) | 1,2 | 0.86 to 1.65 |