Table 2.
Clinical outcome following the transfer of FISH/PGS blastocysts: A comparison of conventional freezing versus vitrification
| aFISH/PGS | |||
|---|---|---|---|
| Group A | Group B | p Value | |
| Number of cycles with cryopreserved blastocyst transfer | 85 | 75 | |
| Mean age of patients (± SD) | 37.8 ± 2.4 | 38.2 ± 3.4 | |
| Mean no. of blastocysts transferred per woman (± SD) | 1.9 ± 0.4 | 1.4 ± 0.6 | |
| Births and ongoing pregnancies (%) | 20 (23) a | 28 (37) b | <0.05 |
| Implantation rate (%) | 38/146 (26) c | 36/99 (36) d | <0.05 |
| Singletons | 15 | 22 | |
| Multiples | 5 | 6 | |
| Miscarriages | 4% | 5% | |
aEmbryos were tested for 9 chromosomes (13, 15, 16, 17, 18, 21, 22, X, Y)
Group A: Conventional freezing
Group B: Vitrification