Cytogenetic study in idiopathic infertile males.

Sex chromatin investigations, including X-chromatin and Y-chromatin, was carried out on one hundred idiopathic infertile males with marked oligospermia or azoospermia. Seven cases (7%) were X-chromatin positive, 18% of the cases had aberrant Y-body (10% big Y, 7% small Y and 1% double Y). Such Y-chromosome abnormalities were frequent among azoospermic than oligospermic males. Chromosomal analysis of patients with positive X-chromatin and/or abnormalities of the Y-chromosome showed chromosomal abnormalities in the seven azoospermic cases (7%) which were X-chromatin positive. These chromosomal abnormalities are varieties of mosaic Klinefelter. Six patients (6%) were 46,XY/47,XXY mosaic and one patient (1%) was 46, XY/47,XXY/48,XXYY mosaic. In conclusion, chromosome analysis as well as sex-chromatin analysis is thus necessary in the investigation of male infertility.