The various conditions that cause infertility in males are
- Abnormal Semen: include Low Sperm Count, Decreased Sperm Mobility, Abnormal Sperm Morphology
- Damage to the testicles affects the quality of sperm leading to infertility. Infection, trauma, surgery, congenital defect, undescended testicles, cancer etc could lead to testicular damage
- Absence of Sperm in semen also known as obstructive azoospermia. This is primarily due to blockage in the tubes of the reproductive system due to infection, surgery or the like.