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First X-Chromosome Related Cause of Male Infertility Identified

The known causes of male infertility not due to physical obstruction are usually because of sex-chromosome defects, such as deletions of the Y chromosome or duplication of the entire X chromosome in Klinefelter syndrome. Eight times out of 10, conventional genetic testing doesn’t reveal a chromosomal problem and infertility is considered idiopathic. We wanted to try to find other genetic reasons for the problem.

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