When sperm cell concentration is lower than 20 million per cc, or when a whole ejaculated matter has less than 40 million spermatozoids. There are different degrees of it. The cause can either remain unsolved in some cases or the right treatment may not be found. It can be caused by alterations in spermatogenesis (formation of sperm cells in testicles) or by an obstruction in the seminal way. It must be examined by an andrologist. If improvement isn’t accomplished, the best assisted reproduction technique, either intrauterine insemination or IVF, is chosen according to the REM test.

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