Gene Linked to Male Infertility May Not be Guilty After All, University of Siena Study  
2/26/2009 7:24:40 AM

SIENA, Italy, Feb. 25 -- Deletion of a gene -- USP9Y -- on the Y chromosome has been associated with infertility, but the identification of a man who lacks the gene but has normal reproductive capabilities calls the link into question, researchers here said.