Sperm can be preserved by freezing and used for treatment at a later time.
How is sperm frozen?
The sperm is analysed, divided into batches and then transferred into vials or straws. The sperm is combined with a cryoprotectant fluid and frozen in liquid nitrogen.
There are various reasons why you may feel you need to freeze your sperm, for instance:
- If you are about to undergo treatment such as chemotherapy which may result in infertility.
- If you are planning to have a vasectomy
- If you think you may be unable to produce a fresh sample for IVF treatment
How long can sperm be frozen?
As long as freezing conditions remain at a constant temperature, sperm can survive the freezing process indefinitely. Not all sperm survive the freeze thaw process but the length of time held in storage does not impact the chances of survival. Sperm can be held in storage in line with the storage consent terms