In connection with fertility treatment, cells or tissues may be required that have been frozen in liquid nitrogen at -196 degrees Celsius for a long period of time (possible for up to 5 years).
For example, it is a good idea to freeze unfertilized eggs and keep them for ICSI treatment, where they will be fertilized and then transferred. If you have a serious illness that can lead to infertility, it is important to freeze healthy sperm or eggs before starting treatment.
In this way, sperm are made available at the right time, just as unfertilized or fertilized eggs can be frozen and thawed as needed.
