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Pylaia, Thessaloniki

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Preservation of Fertility

IVF Center Thessaloniki  >  Preservation of Fertility
Embryo Cryopreservation

Of the embryos created during IVF, only a certain number is transferred to the uterus. If the surplus embryos are of good quality, they can be cryopreserved (frozen) for future use. Embryo cryopreservation occurs in liquid nitrogen at -196⁰C in special tanks, and pursuant to Greek Law they may be stored for up to 5 years. Subsequently, if not claimed, they are destroyed.

At Thessaloniki IVF Center, embryos may be frozen at various stages (between the 1st and 6th day following egg retrieval). The couple may utilize the cryopreserved embryos in a new attempt, and the woman will not have to be submitted to ovarian stimulation and egg retrieval, but only to monitoring and embryo transfer.

Freezing is not suitable for all embryos. It requires good quality embryos, in order to maximize the chances of survival after thawing.

The percentage of pregnancies achieved with cryopreserved embryos is now similar to those achieved with fresh. Embryo cryopreservation is an important decision for the couple and may only be undertaken with written consent. Furthermore, the couple must contact the Center once a year to renew the preservation period. To suspend cryopreservation, the written consent of at least one of the partners is required.

The method of embryo cryopreservation is considered safe internationally, since all studies with newborns born subsequent to cryopreservation do not reveal any statistically significant increase in congenital abnormalities.

Oocyte Cryopreservation (Egg freezing)

Our Center offers egg freezing with the latest cryopreservation technique, vitrification. The possibility of egg freezing is recommended especially to women who are faced with the possibility of partial or total loss of ovarian function due to chemo or radiation therapy.

Furthermore, knowing that women’s reproductive ability declines with age, the technique of egg freezing is also an option for younger women who, for social or personal reasons, wish to postpone having children until later in life.

Sperm cryopreservation

Sperm cryopreservation is recommended for the following reasons:

  • For men with oligospermia with a noted gradual decrease of their sperm parameters.
  • In cases of difficulty in sperm production.
  • In cases where the man is absent on the day of egg retrieval.
  • In cases of testicular biopsy.
  • In cases where the man will be submitted to chemotherapy.

Sperm can remain in cryopreservation for many years without losing its fertilizing ability.

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