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Intracytoplasmic Sperm Injection (ICSI)

ICSI or intracytoplasmic sperm injection is a variation of in vitro fertilisation, IVF, which consists in the direct injection of a single spermatozoid into the interior of the egg.

It is the procedure performed in cases of poor quality sperm or where there have been previous fertilisation failures. In cases where there is an absence of spermatozoids in the ejaculate, they are obtained from the testicles or the epididymis. Intracytoplasmic sperm injection is the recommended assisted reproduction technique for these cases.

This is the currently most successful assisted reproduction technique and has been the solution to many male sterility problems that have not been resolved by in vitro fertilisation. The pregnancy rate per cycle is between 55% and 65%. In patients under 35, this rate exceeds 70%.

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