Genetic studies of BRDT have demonstrated that selective deletion of the BRDT(1)-encoding region is sufficient to confer sterility in homozygous hypomorphic male mice (Shang et al., 2007), and a recently published genome-wide association study of idiopathic male infertility identified single-nucleotide polymorphisms of BRDT as significantly associated with oligozoospermia or azoospermia in European men (Aston et al., 2010). Here, BRDT is linked to Azoospermia.