this vitrified ovules According to a study conducted by Eugin researchers, they retain their quality for a long time without deterioration. The group presented the results of the research Monday at the 38th Annual Congress of the European Society of Human Reproduction and Embryology (ESHRE) in Milan (Italy).

The study did not report differences in survival or fertilization rates of vitrified oocytes. Stored from 4 to 8 years compared to those held for a shorter period of time. Pregnancy and birth rates also remained high, according to the researchers.

To conduct the research, Eugin scientists in Barcelona analyzed more than 5,000 cycles of in vitro fertilization in patients who had previously used vitrified donor eggs. This is a technique used ability to store mature eggs Proportion of women who want to employ them in the future. It is intended to have the same probability of pregnancy in the future as at the time of treatment.

“Currently, vitrification is the most effective method for freezing. oocyte and preserve fertility. However, the effect of long-term storage of oocytes was unknown, as it is a relatively new technique that was introduced 10 years ago,” explains Eugin biologist Marc Torra-Massana.

The method used to have vitrified eggs consists of ultrafast freezing. orvules in liquid nitrogen at -196ºC, pThus, the cells remain unchanged until they are used.

Oocytes are preserved in liquid nitrogen tanks in the vapor phase.

Use of oocyte vitrification

Oocyte vitrification is used for medical reasons. That is, in patients treated too aggressive for your fertility, such as oncology or gynecological surgeries; It is also applied if the woman decides to postpone motherhood for social reasons.

This procedure is usually performed on women up to the age of 40. However, doctors especially recommend it to those under the age of 35 who want to become mothers in the future. The success rate of the treatment varies according to the age of the woman at the time of the oocyte freezing procedure.

For this reason young fertility is preservedbetter success rates are recorded.

“The results of this study we studied for 8 years, represents the next step in vitrification knowledge applied to oocyte cryopreservation. Torra-Massana has shown that egg donation programs are a good alternative for younger patients who need to preserve their eggs for a long time, while providing new scenarios for treatments,” Torra-Massana summarized.