Egg Freezing with Vitrification

Did you know that an egg is the largest cell in the human body? As a result, it is the most difficult to freeze and then thaw without damage. In fact, before the EVES technique became available, only about half of any group of eggs would survive the freeze-thaw process. This was because of sharp ice crystals forming during the freezing process which damaged the egg.

EVES (Egg Vitrification Egg Storage) Technique

Now however, we have the benefit of an entirely new technique called Vitrification, which literally means ‘turning to glass’. In this, the eggs are first dehydrated to get rid of as much water content as possible. Then, they are plunged rapidly into liquid nitrogen at almost -200°C. This step is performed so quickly that prevents ice formation and results in a glass-like state.

Over 85% of eggs undergoing the EVES super-fast freezing technique survive the freeze-thaw process and a high proportion of these are capable of undergoing fertilisation.

Take your first step

Make an appointment
Book a consultation with a Doctor
Come and meet us
Book an informal clinic visit and meet our team
Find your local clinic
Use our clinic locator to find your local clinic
Request further information / Ask a Question
CARE Fertility Egg Donation Campaign

You may also be interested in…

CARE Egg Freezing Vodcast

CARE egg freezing vodcast including an interview with Simon Fishel.


CARE Fertility Pioneering Firsts

1978 - World's first IVF baby

1981 - First male factor patient treated

1982 - World's first baby delivered after intrauterine sperm/egg transfer

1984 - World's first baby from blastocyst transfer

1990 - World's first baby born after micro-injection

1992 - Britain's first SUZI treatment baby

1992 - Britain's first "sugar drop" frozen embryo baby

1996 - World's first testicular spermatid baby

2007 - Europe's first baby born following embryo screening using Comparative Genomic Hybridisation (CGH)

2009 - Birth of World's First baby following array CGH screening

2010 - UK's first baby born through PGD for HLA tissue matching

2010 - Blastocyst Chromosome Screening - UK's first baby born

2010 - First multi-factorial genetic chromosome tissue typing and translocation analysis of embryos in an IVF cycle

2010 - First UK based total treatment cycle for PGD and HLA Tissue Matching - Fanconi Anaemia

2011 - First UK pregnancy following use of an Embryoscope

All CARE Fertility Pioneering Firsts

Patient Stories

A CARE patient tells her story

Egg Freezing story