Many types of male infertility aren’t preventable. However, you can avoid some known causes of male infertility:

  • Don’t smoke.
  • Limit or abstain from alcohol.
  • Steer clear of illegal drugs.
  • Keep the weight off.
  • Don’t get a vasectomy.
  • Avoid the heat.
  • Reduce stress.
  • Avoid exposure to pesticides, heavy metals and other toxins.

Though the risk isn’t conclusive, if you’re an avid cyclist, consider using a gel saddle and a full-suspension bicycle. It may also help to avoid wearing very tightfitting clothing for long periods of time.