Unlike freezing of eggs the freezing of sperm is a very successful procedure and relatively simple. There are many reasons for this including the prevention of damage to sperm production in men requiring treatment for cancer, which may affect their fertility, as a backup for men planning to be sterilised, for sperm donors, and even for couples who wish to attempt conception but the male partner has to be away over her fertile time period.
The male undergoes a semen analysis and infection screen. Once this is done the laboratory plans a number of freeze sessions, which requires the male to produce his sample preferably on site at the laboratory and the sample is frozen. Freezing can decrease the number of sperm but if this occurs these sperm can be used for IVF or ICSI.