NO. group | Number of patients | Number of fertility | Number of infertility | Infertility rate |
Observation | 31 | 25 | 6 | 80.6 |
Comparison | 31 | 15 | 16 | 48.4 |
χ2 |
|
|
| 7.05 |
P |
|
|
| 0.008 |