What causes male infertility?

KDAH

Male infertility is most commonly caused by sperm abnormalities. Sperm can be immature, low in number, improperly shaped, or incapable of swimming. Infertility can also be caused by certain lifestyle behaviours such as tobacco use, heavy alcohol use, steroid use, or exposure to pollutants. Consult a fertility expert for a thorough diagnosis and further action.