| Aetiology | Number | Percentage (%) | χ2 | P-value |
| Tubal | 72 | 19.1 | 214.213 | 0.000 |
| Anovulatory | 84 | 22.3 |
|
|
| Poor sperm parameters | 176 | 46.8 |
|
|
| Uterine | 32 | 8.5 |
|
|
| Unknown | 12 | 3.3 |
|
|
| Total | 376 | 100.0 |
|
|