Table III. Clinical information.
| Letrozole only (SD) | Gonadotropins only (SD) | Significance testing3 | |
| Units of FSH used | 0 | 344.5 (177.5) | p <0.00014 |
| Lead follicle day of hCG (mm) | 13.6 (1.9) | 13.4 (4.0) | 0.83 |
| Sum of 3 largest follicles (Day of hCG) | 35.2 (3.4) | 34.9 (6.9) | 0.667 |
| Endometrial line thickness on day of hCG | 6.1 (1.3) | 7.2 (2.4) | 0.051 |
| Endometrial line thickness on day of transfer | 9.1 (2.7) 1 | 10.6 (2.1)2 | 0.055 |
| # Receiving early estrogen (%) | 10/21 (47.6%) | 17/54 (31.5%) | 0.284 |
| Oocytes retrieved | 11.6 (5.5) | 12.3 (5.1) | 0.603 |
| Mature oocytes on day 0 | 1.7 (1.7) | 3.1 (1.9) | 0.0044 |
| Total mature oocytes | 6.3 (3.1) | 8.6 (3.5) | 0.103 |
| Total fertilizations | 4.9 (2.5) | 5.8 (2.8) | 0.203 |
| Total high quality oocytes | 1.4 (1.4) | 2.6 (1.6) | 0.0044 |
| # Transferred | 3 (0.8) | 2.8 (0.7) | 0.307 |
1 Missing data- 10 observations. 2 Missing data- 49 observations. 3Using the unpaired Fisher exact test and the unpaired t-test, as appropriate. 4Statistically significant.