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Intracytoplasmic sperm injection (ICSI) is a technique in which a single sperm is placed into an egg. ICSI is the biggest advancement in fertility treatment since in vitro fertilization (IVF) and has allowed many men to have genetically-related children. Since ICSI requires very few sperm, it can be an effective treatment for men with severe sperm abnormalities. Typically, ICSI uses ejaculated sperm, but surgically retrieved sperm can also be used. ICSI is performed as part of an IVF cycle.


