In an
assisted
fertilization treatment, it is usual to transfer 2 or
3 embryos that may have been obtained from oocytes of the woman
that is receiving the treatment or from oocytes donated by another
woman.
In some cases, as a result of ovarian hyperstimulation, more embryos than the ones needed are
obtained; these embryos are not discarded, they are preserved at very low temperatures. In order
to preserve them, they are placed in labeled airtight glass containers and are immersed in liquid
nitrogen within 48 and 72 hours after fertilization has taken place. This way, their metabolism
is arrested and they can be preserved for a long time.
These embryos will be used in future treatments if the first one is not successful and pregnancy
is not achieved, or they will be preserved for the moment the couple decides to have a second
child without having to repeat the whole procedure.
If the embryos were obtained thanks to oocytes donated by another woman, brothers of different
ages but with the same genetic information may be born.
The survival rate after defrosting is between 80% and 85%.
Phone: [+54] (11) 4706 - 0786
Espaņol
