Frozen Embryo Transfer (FET): A Rational Approach to Hormonal Preparation and How new Methodology is Impacting IVF
Until about 15 years ago, we believed that the best and safest way to
cryopreserve embryos was by using a slow freezing method. What we
subsequently learned was that the slow freezing process caused the
formation of intracellular ice and that this, by damaging embryos and
compromised their post-thaw survival as well as IVF outcome,
significantly. The introduction of ultra-rapid embryo freezing
(vitrification) has changed all that. With vitrification, embry…