In addition, the AUA/ASRM guidelines, suggest performing KA and Y-chromosome microdeletion analysis in azoospermic or severe oligozoospermic men (<5 million sperm/mL) with elevated FSH or testicular atrophy or a presumed diagnosis of impaired sperm production as the cause of azoospermia [4]. Here, BRD2 is linked to Testicular atrophy.