Vitrification / Cryopreservation
Vitrification is a more modern cryopreservation method, during which the reproductive cells (sperm, eggs and embryos) are rapidly cooled to -196 °C within one second. Media containing high concentrations of cryo-protective substances, protecting cells from damage, are used during this method of freezing.
Reproductive cells can be stored in this manner for many years. In spite of the standardised procedures, not all embryos survive the process of freezing and thawing in a condition enabling transfer into the woman’s uterus.