Cryopreservation (freezing) of eggs and embryos is a common technique used to preserve fertility for many women.
Though itâ€™s been performed for 40 years, its ability to produce high live birth rates was impeded by an ineffective freeze-thaw method.
Itâ€™s not unusual for water crystals to form in the slow freeze process of cryopreservation, which can decrease egg and embryo viability.
However, a relatively new process, called vitrification, has produced live birth rates that are similar to those observed with fresh eggs or embryos.
Vitrification utilizes a quick-freeze technique that prevents the formation of ice crystals. Â Additionally, a technique called â€śartificial collapsingâ€ť can be performed prior to vitrification to remove traces of water using a laser.