Egg cryopreservation has also been attempted, in order to have egg viability sustained in liquid nitrogen. Unfortunately, the survival rates of such eggs have until now been disappointingly low.
A new egg freezing method (vitrification) has recently been developed; this method promises survival rates that exceed 70%. This new technique represents a major step forwards in assisted reproduction, since it offers women pregnancy opportunities with their own eggs for a long period in the future and thus reduces early menopause anxiety.
Women who are about to undergo treatment that may affect their ovaries (radiotherapy, chemotherapy or a major operation) can preserve their eggs for later use.
Therefore, proper planning can now help women avoid egg donation programmes and achieve pregnancy with their own eggs.