| Variable | Description (n = 20) |
| Age (mean ± standard deviation) | 33.5 ± 6.0 year |
| Subfertility duration (mean ± standard deviation) | 4.0 ± 3.6 year |
| Primary subfertility (n, %) | 19/20, 95% |
| Secondary subfertility (n, %) | 1/20, 5% |
| Dysmenorrhea (n, %) | 5/20, 25% |