Table 1 Baseline characteristics of patients
| Â | Letrozole | No letrozole | Wilcoxon W/t/X2 | P |
|---|---|---|---|---|
N | 65 | 65 | Â | Â |
Age of women (year) | 28 (21,35) | 29 (23,36) | −1.182 | 0.237 |
Body mass index (kg/m2) | 21.76 ± 2.4 | 22.13 ± 2.45 | − 0.878 | 0.382 |
Duration of infertility (year) | 3 (1,10) | 3 (1,12) | −0.262 | 0.793 |
Number of embryo transfer | 2 (0,2) | 2 (0,2) | −0.229 | 0.819 |
Infertility type | Â | Â | 0.281 | 0.596 |
 Primary infertility | 30 (46.15%) | 27 (41.54%) |  |  |
 Secondary infertility | 35 (53.85%) | 38 (58.46%) |  |  |
Antrol follicle count | 22 (14,23) | 22 (12,30) | −0.592 | 0.554 |
Mean baseline hormone values (Day3) FSH (UI/L) | 5.36 (2.72,11.27) | 5.51 (3.24,12.01) | −0.17 | 0.865 |
Progesterone (nmol/L) | 0.27 (0.1,0.95) | 0.27 (0.1,1.07) | −0.142 | 0.887 |