[Sperm retrieval techniques in patients with non-obstructive azoospermia]

Patients with non-obstructive azoospermia (NOA), which accounts for up to 10-15% of all cases of male infertility, until recently could only become parents using donor sperm or through adoption. Modern technical capabilities of sperm extraction in combination with the use of assisted reproductive technologies, make it possible to effectively overcome infertility in this group of patients. A number of highly effective techniques have been proposed for spermatozoa retrieval. However, surgical intervention is associated with certain risks, and therefore, the choice of the optimal treatment method is under discussion. A total of 52 articles were analyzed using the MEDLINE database (PubMed) to form an overview of the current principles of examination and preparation of a patient with NOA for the surgical sperm retrieval. This review is dedicated to the role of diagnostic testicular biopsy. In addition, a comparative information on the efficacy and safety of percutaneous, fine-needle aspiration, open multifocal and microdissection (micro-TESE) testicular biopsies is presented. Of the currently available sperm retrieval techniques in the urologic armamentarium, micro-TESE seems to be both the most effective and the safest. Micro-TESE can be a cumbersome procedure, however, it provides successful treatment in situations previously associated with zero chance of pregnancy.