Give up recreational drugs, such as marijuana and cocaine, which can affect the brain chemistry responsible for releasing reproductive hormones. A father's drug use can also cause birth defects. A host of lifestyle factors can affect your potency. The good news is, once you become aware of these often hidden threats to fertility, they are fairly easy to avoid. Jacuzzis, saunas, and tight-fitting clothes.
Testicles function best when they keep their cool.
Steamy spa equipment, snug jeans, synthetic shorts, and tight underwear can all overheat your testicles and inhibit sperm production. Impotence can be an unexpected and frightening side effect of avid cycling. A study from the University of Southern California School of Medicine found that a bicycle seat's steady pressure on the groin area can damage arteries and nerves. To avoid this problem, periodically lift yourself off the seat when riding long distances. See a doctor if you feel any numbness or pain or have erection problems after biking.