[Segregation of sex chromosomes in the spermatozoa of 46, XY/47, XXY patients with oligozoospermia by dual fluorescence in-situ hybridization].

OBJECTIVE: To observe the segregation of sex chromosomes in the spermatozoa of a 46, XY/47, XXY patient with oligozoospermia.

METHODS: The number of X and Y chromosomes of the ejaculated spermatozoa from the patient with mosaic 46, XY/47, XXY was analysed by X/Y dual fluorescence in-situ hybridization (FISH).

RESULTS: Of the 100 spermatozoa analysed, 97 showed either one X chromosome-specific green signal or one Y-chromosome-specific red Y signal in each spermatozoon and only 3 showed no signal. The frequencies of X- and Y-bearing spermatozoa were 49% and 48% respectively. The ratio of X- to Y-bearing spermatozoa was about 1:1 as expected. There was no statistical difference between the chromosome XX and XY frequencies in each spermatozoon from the patient in comparison with those estimated in the control.

CONCLUSION: The spermatozoa of 46, XX/47, XXY mosaic patients have a normal gonosomal complement, which allows infertility treatment to be carried out by ICSI.