Embryo freezing, also known as cryopreservation, is the process of preserving embryos before cooling them to very low temperatures. Cooling is done in the laboratory using specialised freezing equipment and then stored in liquid nitrogen for long periods.
When to opt for embryo freezing?
The goal of this process is to have frozen embryos that can be thawed and transferred to a woman’s uterus for future use, without having to stimulate the ovaries to produce eggs. One may consider it if:
- You want to use embryos in future IVF and ICSI cycles.
- You are undergoing a medical treatment that could potentially affect your fertility.
- Your health is at risk and want to freeze embryos with your partner.
- You want to freeze embryos before undergoing sex change operation.
What is the success rate for embryo freezing?
Embryo freezing is increasingly becoming more and more comparable to success rates of using fresh embryos. According to studies, for women over 35 with high progesterone levels, frozen embryo transfers were 73% more likely to be successful than a fresh transfer.