Test Details: Y chromosome microdeletion (YCM) is a family of genetic disorders caused by missing gene(s) in the Y chromosome. YCM is known to be present in a significant number of men with reduced fertility. In men with reduced sperm production some form of YCM has been detected and varies from oligozoospermia, significant lack of sperm, or azoospermia, complete lack of sperm. This test aids in the detection of Y chromosome microdeletions associated with oligospermia and azoospermia. About 15-20% of azoospermic men and about 10% of severely oligospermic men present with microdeletions of Yq. This test targets 20 genetic loci.