TECHNIQUE

Embryo Vitrification

After a cycle of In Vitro Fertilization it is common to have leftover embryos of good quality. In order to be able to be used in subsequent cycles or in a second gestation, these are preserved for long periods of time thanks to the embryo vitrification technique.

In which cases are embryos vitrified?

Fundamentally those leftover embryos of good quality of an In Vitro Fertilization treatment are vitrified, that is, those that are in optimal conditions of development, have not been transferred in the first cycle, but also have a guarantee of implantation. They are vitrified to be used in a subsequent cycle without the need for a new ovarian stimulation.
The vitrification of embryos can also be performed if on the day of the transfer the gynecologist detects any abnormality in the woman’s endometrium that could jeopardize the possibility of pregnancy, being necessary to postpone the transfer.

How is vitrification of embryos performed?

Vitrification is a technique that offers better results than the conventional freezing process, offering a higher embryo survival rate and a better implantation rate.
Unlike the classic freezing method, vitrification cools cells much faster and in a very short time. The conventional technique freezes at 0.3 ° C per minute, while vitrification cools the cells ultrafastly and at a rate of more than 15,000 ° C per minute. This cooling prevents the formation of ice crystals inside the cells, minimizing cell damage compared to other techniques.

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Where and how long do they stay?

Once vitrified, the embryos are kept in liquid nitrogen at a temperature of -196º C for an indefinite time.

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