Oocyte cryopreservation

Thanks to the highly developed freezing method, the fact, which many people  had for years hoped for, has become true – we can freeze eggs so that they retain their quality for several years before thawing.
 
Oocyte cryopreservation (eggs) is a novel assisted reproduction technology. It has become successful thanks to vitrification – a rapid cooling method. 
 
In Sanatorium Helios vitrification has been employed as a method of embryo cryopreservation since 2007. A big step forward in the cryo embryo transfer was with the certain modifications of previously used vitrification methods – called cryotop vitrification. With this method we achieve the same results as with fresh embryos on a long term basis.
 
With this unique method of freezing, we can offer  cryopreservation of oocytes (eggs) to our patients. Oocytes are, due to their high susceptibility to physical or chemical damage, more problematic material for cryopreservation than embryos. During freezing the meiotic spindle can be damaged or unwanted activation due to cold can take place.
 
Although the success rate of cryopreserved oocytes is lower than of embryos, for many women it is the only chance to have their own child in the future.
 
The most common reasons why women have the oocytes frozen is imminent loss of fertility, ie. cancer treatment, chemotherapy, radiotherapy or imminent ovarian failure. Another reason may be the fact that a woman has no partner and fears that by the time she has a partner, she would be no longer fertile.

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