Table 1 Fertility data from included studies.
| Study | Population | Year | UC infertile | UC fertile | Medical infertility rate (%) | IPAA infertile | IPAA fertile | IPAA infertility rate (%) |
|---|---|---|---|---|---|---|---|---|
| Wikland6 | Swedish | 1989 | 8 | 19 | 29.6 | 8 | 6 | 57.2 |
| Oresland7 | Swedish | 1994 | 0 | 7 | 0.0 | 13 | 1 | 92.9 |
| Counihan8 | US | 1994 | 5 | 105 | 4.5 | 18 | 92 | 16.4 |
| Sjögren9 | Swedish | 1995 | 5 | 25 | 16.7 | 5 | 25 | 16.7 |
| Hudson10 | Scottish | 1997 | 15 | 78 | 16.1 | 6 | 5 | 54.5 |
| Olsen11 | Swedish | 2002 | 19 | 65 | 22.6 | 122 | 27 | 81.8 |
| Gorgun12 | US | 2004 | 45 | 72 | 38.4 | 70 | 50 | 58.3 |
| Johnson13 | Canada | 2004 | 8 | 52 | 13.3 | 59 | 94 | 38.6 |
| Overall | 105 | 423 | 19.9 | 301 | 300 | 50.1 | ||
| Overall (excluding Gorgun) | 60 | 351 | 14.6 | 231 | 250 | 48.0 |
UC, ulcerative colitis; IPAA, ileal pouch‐anal anastomosis.