**2.2 Obstruction**

Tube blockage is one more reason for the infertility in men. Obstruction in the tubes that pave way to the passage of sperm from the testicle to penis can have underlying causes like previous infections, pelvic surgeries, and cystic fibrosis associated with it. In case a severe duct obstruction is found, patients are advised to undergo the invasive procedure like transurethral resection to pave way for the normal course of ejaculate besides proving very important for the maintenance of sperm parameters [10].
