Social freezing describes the freezing of eggs and sperm cells for non-medical reasons. Modern technical processes have also led to a strong increase in demand in Germany in recent years. More and more young women can imagine to fulfil their desire for children at a later date.
Until recently, cryopreservation of early egg cell stages up to the mature egg cell (in an unfertilised state) was only possible with unsatisfactory success, as suitable freezing methods were not available. However, the development and refinement of new freezing techniques has recently led to the fact that in the meantime, high survival and satisfactory fertilisation rates can be achieved after cryopreservation even with so-called metaphase II eggs (mature unfertilised eggs).
After hormonal stimulation of the ovaries by means of transvaginal follicle puncture, it is possible to obtain eggs, freeze them and store them frozen for many years while maintaining their biological activity. If a couple wishes to have children, these eggs can be thawed and fertilised extracorporeally. The resulting embryos are then transferred to the woman's uterus (embryo transfer).