Infertility isn’t just a woman’s problem.

By News & Views
February 22, 2016
Credit: Getty Images

Infertility isn’t just a woman’s problem. Four in 10 cases are linked to the male partner, estimates the American Society for Reproductive Medicine. Often the cause is physical. (A swelling of the veins that drain the testicles can lower sperm quality, for example.) But lifestyle factors may play a role, too.

His age

As men get older, the volume of their semen may decrease, and the percentage of chromosomally normal sperm may also drop.

His weight

Men with waistlines of 40 inches or more have about a 22 percent lower sperm count than men with waists under 37 inches, per a 2014 study.

His diet

Research performed at Harvard found that guys who consume a diet high in saturated fat have lower sperm counts.

His drinking

Excessive alcohol use has been linked to lower sperm production, erectile dysfunction and decreased testosterone.