Egg Donation: Fresh Or Frozen Eggs?
In recent years, one of the questions of particular importance for women who opt for egg donation is whether or not the eggs have been frozen, and which is the best option. A lot of recipients experience some doubts when starting this assisted reproduction technique as they are unsure if using frozen eggs reduces the chances of success.
Egg freezing processes have improved massively in the last few years. The process of vitrification enables to freeze eggs when a woman is fertile. These developments have lead to higher survival rates than with other freezing techniques. According to Instituto Bernabeu, it is a safe technique that prevents the formation of ice crystals within the cell, preventing them from being destroyed when thawed.
In addition to this with the use of frozen donor eggs there is no need to synchronise the preparation of the recipient’s uterus with the donor, as is the case with fresh donor eggs. In this way, the patient does not have to wait for transfer until the donor is ready.
However, eggs are the biggest cell in the body and this makes them vulnerable to thermal stress. Thus, their survival rate is not as high as some cellular structures may suffer in the freeze-thaw process. Instituto Bernabeu reports that while frequency of use of previously vitrified eggs has increased among patients, the results are not the same as what we can currently achieve with fresh oocytes.
In this regard, Instituto Bernabeu states that fresh eggs currently offer better results and safety, both to the patients and the children.