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Embryo freezing, also known as embryo cryopreservation, is an assisted reproduction technique that allows the preservation of good quality embryos, which were previously obtained by means of in vitro fertilisation (IVF), to be used later in a future attempt at pregnancy.
This procedure is a usual part of in vitro fertilisation (IVF) treatments. Once our team of specialists have obtained several good quality embryos, one or two can be transferred into the uterus and the rest can be frozen for future attempts, without the need to repeat the whole treatment from the beginning. This reduces the risk of multiple pregnancies and offers a safe option in case the first attempt is unsuccessful.
at extremely low temperatures (-196°C), which completely stops their biological activity and allows them to be preserved in perfect condition for years.
Today, the most widely used method is vitrification, an ultra-fast freezing system that prevents the formation of ice crystals and protects the cells of the embryo. Thanks to this technique, the vast majority of embryos survive the freezing and thawing process —with success rates ranging from 95 to 98%— and retain their full potential to achieve pregnancy.