Due to gonadotoxicity of chemotherapy and radiotherapy, gamete freezing is a viable option for cancer patients. You may decide to freeze and store your eggs or embryos to delay having children. Oocyte preservation has an advantage as woman’s chance of conceiving naturally. Both quantity and quality of eggs diminishwith age, so women who store their frozen eggs or embryos when they are young may have a better chance of successful pregnancy in future. Oocyte cryopreservation is relatively a new technique. No increase in chromosomal abnormalities, birth defects and developmental defects have been reported in the off-springs born from cryopreserved gametes when compared with the pregnancies of general population.