Frozen embryo transfer
This fast freezing method – vitrification avoids the extensive damage to embryo tissues, it avoids the formation of ice crystals.
When are embryos are frozen (vitrified)?
On the chart above, there is a comparison of the success rate of fresh tranfers and 1st frozen embryo transfers – G+ is a positive pregnancy test, ASP+ clinical pregnancy
demonstrated by fetal heartbeat, P+ delivery.
There is evidently higher success rate in vitrified embryo transfers compared to fresh transfers in cycles after stimulation.Higher success rates of pregnancy are due to the natural cycle in which the embryos are transferred as frozen embryos, and also in this group it is partly reflected the higher success rates of transfers of the embryos with the correct genetic finding.