Sperm banking or freezing is a method of preserving sperm cells, and is especially useful for men who want to delay parenthood until a later stage. It is also useful for men who plan to undergo certain types of medical treatments (chemotherapy and radiation for instance) that could impact their sperm quality. Sperm may also be frozen as a backup option during a couple’s fertility treatment. Semen is analysed after being collected through ejaculation or surgically assisted retrieval like TESA or TESE, before the sperm cells are frozen in a laboratory. During an Intrauterine Insemination (IUI) or In-Vitro Fertilisation (IVF) procedure, the frozen sperm samples are used.