Table 4.
Birthweight after Fresh embryo transfer and frozen embryo transfer in grams (SD) in Fresh/FET cohort according to number of embryos transferred, stage of embryo transfer and freezing method.
| Fresh group (n = 158) | FET group (n = 158) | p-values | |
|---|---|---|---|
| Number of embryos transferred | |||
| 1 | 3254.3 (470.6) | 3514.2 (460.7 | <0.0001 |
| 2 | 3183.4 (440.5) | 3478.8 (410.3) | 0.0102 |
| Stage of embryo transfer | |||
| Day 2/3 | 3214.2 (489.7) | 3481.8 (464.2) | 0.0009 |
| Day 5/6 | 3269.5 (434.3) | 3526.4 (446.1) | 0.0003 |
| Freezing method | |||
| Slow freezing | 3214.8 (389.3) | 3549.3 (449.3) | 0.0019 |
| Vitrification | 3243.7 (482.2) | 3498.2 (454.4) | <0.0001 |