Table III. Use of letrozole compared to clomiphene citrate in cases with transfers.
| Letrozole (% or SD) | Clomiphene citrate (% or SD) | p value1 | |
| Cases | 62 | 42 | |
| Age | 38 (4.3) | 36.3 (4.3) | 0.050 |
| AMH (IU/ml) | 0.5 (0.4) | 0.7 (0.5) | 0.037 |
| AFC | 6.8 (3.8) | 7.5 (4.0) | 0.369 |
| Gonadotropins used (IU) | 831 (396) | 829 (299) | 0.978 |
| Peak estradiol (ng/ml) | 516 (430) | 797 (577) | 0.005 |
| LH on day of hCG (IU/L) | 2.8 (3.1) | 3.0 (2.5) | 0.728 |
| Number of follicles > 16 mm | 1.9 (1.1) | 1.7 (1.1) | 0.365 |
| Number of follicles > 12 mm | 3.1 (1.7) | 3.5 (1.8) | 0.253 |
| Number of mature oocytes | 2.4 (1.2) | 3.3 (2.1) | 0.007 |
| Number of fertilized oocytes | 1.9 (1.1) | 2.5 (1.6) | 0.025 |
| Number of high quality embryos | 0.9 (0.8) | 1.3 (0.9) | 0.019 |
| Number of embryos transferred | 1.5 (0.7) | 2.5 (1.6) | 0.001 |
| Cases with a single embryo transferred | 46 (74.2%) | 18 (42.8%) | 0.002 |
| Endometrial thickness at hCG (mm) | 7.5 (2.4) | 7.9 (2.3) | 0.398 |
| Endometrial thickness at transfer (mm) | 9.8 (2.1) | 10.1 (2.1) | 0.476 |
| Clinical pregnancies | 16 (25.8%) | 10 (23.8%) | 1.0 |
| Live births | 11 (17.7%) | 9 (21.4%) | 0.8 |
1Two sided unpaired t-test or Fisher’s exact test