Fertilized eggs may only be defrosted and applied if you concede in writing
If, in your case, we have surplus fertilized eggs we can offer freezing if the eggs are suitable.
However, in just approximately 25 per cent of cases eggs can be frozen.
All surplus fertilized eggs will be cultured to the blastocyst stage. Only blastocysts with regular and stable divisions can sustain freezing. From the frozen blastocysts about 5-10 % will be damaged during freezing/warming.
The blastocysts will be defrosted on the day prior to the scheduled transfer to the uterus. The chance to become pregnant with frozen and warmed blastocysts is equal to transfer of fresh embryos.
(Document for thawing embryos, single women)
(Document for thawing embryos, couples)