They may also demonstrate atretic seminal vesicles and epididymis.3 All of these contribute to obstructive azoospermia which is characterized by low semen volume (0.5-0.7 mL), an acidic pH due to low concentration of fructose and α-glucosidase, and no sperm.4,5 There are notable cases of infertility in men with CFTR mutation that demonstrate nonobstructive infertility. This evidence concerns the gene CFTR and Infertility.