The chromosomal anomalies, microdeletions of AZF region of Y-chromosome and CFTR gene mutations have been studied among 80 infertile men with idiopathic spermatogenetic failure: 36 (45%) patients with aspermia, 19 (24%) patients with azoospermia and 25 (31%) patients with severe oligoasthenoteratozoospermia. In total 30% males with spermatogenetic failure genetic factor of infertility was observed. Karyotype anomalies were observed in 17.5% of infertile men, within 16.2% numerical and structural gonosomal anomalies and in 1.3%--Robertsonian translocation were revealed. In 11% males with spermatogenetic failure, Y-chromosome AZF region microdeletions were detected. The frequency of CFTR major mutation F508del among infertile men was 6.25%. 5T allele of polymorphic locus IVS8polyT was detected in 7.5% of examined men. The results obtained indicate the high complexity of cytogenetic and molecular-genetic studies of male infertility.
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