The process of embryo freezing involves carefully freezing the embryo in liquid nitrogen at a very low temperature of -196°C. This process pauses aging by freezing the embryo for a specific time, maintaining its utility and effectiveness.
Embryos are first cooled and then placed in thin plastic straws sealed at both ends. Each embryo is given a unique identification number along with the name of the donor. They are then stored in larger containers filled with liquid nitrogen after being placed in vacuum-lined goblets.
Embryo cryopreservation is beneficial for using surplus embryos without going through a full IVF cycle, increasing the chances of pregnancy for patients who have failed to conceive earlier. Embryos can also be donated to other women or couples for fertility treatments. The main benefit of embryo freezing is the ability to store embryos when they are most healthy and usable, increasing the chance of successful fertilization and healthy pregnancy.
It’s important to note that there is a time frame for embryo preservation, and the cost of embryo freezing may change in the future. Therefore, it’s advisable to plan for pregnancy well in advance and use frozen embryos from previous IVF cycles if needed.
Frozen embryo transfer (FET) offers the advantage of scheduling embryo transfer well in advance and has proven to be effective in viable pregnancies. The cost of freezing embryos in India is currently low compared to other countries, but it may change with time and increased demand.