| Variables | Size (N = 70) | Percentage (%) |
| History of tubal obstruction | ||
| Yes | 7 | 10.0 |
| No | 63 | 90.0 |
| Gynecological congenital malformation | ||
| Yes | 0 | 0 |
| No | 70 | 100 |
| History of STIs | ||
| Yes | 43 | 61.4 |
| No | 27 | 38.6 |
| C. Trachomatis infection | ||
| Yes | 33 | 47.1 |
| No | 37 | 59.9 |
| History of pelvic surgery | ||
| Yes | 10 | 14.3 |
| No | 60 | 85.7 |