Table 2.
Cycle characteristics
| Parameter (Unit) | FET group | Fresh ET group | P value |
|---|---|---|---|
| Number of patients | 187 | 187 | |
| Gonadotropin dose | 15.68 ± 1.3 | 15.66 ± 1.4 | 0.88 |
| (No. of 75 IU ampules) | |||
| E2 day of hCG (pg/mL)ª | 3128.5 ± 701 | 3140.1 ± 806 | 0.88 |
| No. of oocytes retrievedª | 15.3 ± 2.5 | 15.8 ± 2.2 | 0.056 |
| ICSI performance (%) | 49.7 | 47.1 | 0.67 |
| Assisted hatching (%) | 62 | 4.8 | 0.00 |
| Fertilization rate (%) | 72.9 | 72.7 | 0.56 |
| No. of embryos vitrifiedª | 7.4 ± 2.8 | 5 ± 2.1 | 0.00 |
| No. of embryos warmedª | 3.2 ± 1.4 | – | – |
| Cryosurvival n (%) | 1328 /1383 (96.02) | – | – |
| No. of embryos with 100% | |||
| Blastomere survival n (%) | 1000/1328 (75.3) | – | – |
| No. of embryos transferredª | 2.16 ± 0.36 | 2.22 ± 0.41 | 0.11 |
| No. of top-quality embryos transferredª | 1.84 ± 0.36 | 1.90 ± 0.29 | 0.08 |
| Implantation rate n (%) | 100/404 (24.7) | 72/416 (17.5) | 0.02 |
ªValues are mean ± SD