Cancer patient life expectancy rose considerably due to the timely diagnosis and established treatments. Nonetheless, these treatments cause the reproductive function to fail and deteriorate, reducing the number of growing cells, leading to a loss of fertility.

A woman fertility begins to decrease after the age of 30, acelerating after the age of 35 in relation to the quality and quantity of oocytes remaining in the ovary. Age is the best indicator of oocyte quality, therefore, between the ages of 40 and 45, very few women will be able to archieve a successful pregnancy. Currently many women want to postpone their motherhood for various personal, economic or work reasons, so cryoperservation of their eggs at and early age is the best option to keep possibility of becoming mothers when the patient is ready to have a baby.