Freezing treatment (FER)
If, in the case of test tube treatment, there are "high-quality" excess embryos, they can be frozen and stored in liquid nitrogen at -196 ° C. The embryos can later be thawed and disintegrated, usually without the need for hormonal stimulation.
We only freeze embryos that have evolved to the blastocyst stage.
Although we only freeze high-quality embryos, not all embryos survive the process of freezing and thawing. On average, over 90% of the blastocysts survive thawing.
Under current legislation, frozen embryos must be stored for a maximum of 5 years. They must be destroyed if the couple they belong to dissolves the relationship or if one of the parties dies. However, it can be agreed between the parties that if the man dies, then the woman must be given embryos created with the man's semen.
If the embryos originate from the treatment of a couple, it is important note that:
- Both must give written consent for freezing and storage.
- The embryos may only be thawed and used if both parties give written consent before thawing and laying. "Consent to thaw frozen embyos" can be found here.