Maintain a healthy weight
Exercise regularly
Eat a balanced diet rich in zinc, selenium, folate, and antioxidants
Stay hydrated
Get enough sleep
Reduce stress
Avoid smoking
Limit alcohol intake
Avoid recreational drugs
Avoid overheating the testicles
Wear loose-fitting underwear
Reduce exposure to toxins and chemicals
Treat infections promptly
Manage chronic health conditions
Review medications with a doctor
Have regular ejaculation
Consider fertility testing if concerned