IVF Spring > Fertility preservation > Embryo Freezing
During a traditional IVF cycle, many more embryos are generated that are required by the prospective parents. These additional embryos can be stored for future use in case the first IVF cycle is not successful. The embryos are tested for quality and the good quality embryos are collected, frozen at temperatures below -196 degrees Celsius and stored away to be available for use at a future time.
What is Embryo Freezing?
During an IVF cycle, a large number of embryos are collected. Of these embryos, only 2 or 3 embryos will be transferred to the woman’s uterus. This is done to maximize the chances of pregnancy and the other is to avoid the risk of multiple births (having 3 or more kids in the same pregnancy).
The embryos that are not used during one stimulated IVF cycle can be cryopreserved and stored over time. This process is known as embryo freezing.
Advantages of Embryo Freezing.
Who is Embryo Freezing Suitable for?
Embryo Freezing is suitable for patients who:
Embryo Freezing Process
Embryos can be frozen at any stage from Day 1 to Day 6 after egg retrieval. Embryos are tested for quality before they can be frozen. Better quality embryos have a better chance of surviving the freezing and thawing process so that they can be used for future pregnancies. The Embryo freezing process is as follows:
Success of Embryo Cryopreservation and Thawing
Success rates of using frozen embryos for pregnancies are increasing on a regular basis. Success rates of frozen embryos can be said to be comparable to using fresh embryos under most circumstances. For women above the age of 38, the success rate of using embryo cryopreservation and thawing for pregnancies are much higher as the embryos used will have been frozen when they were much younger.