What are the most common causes of reduced fertility in men?

For many, medical testing (nevermind fertility testing) can conjure up some invasive, faint-worthy examination procedures. Testing, however, is usually no worse than a regular medical check-up with your family doctor. Depending on the specifics of your case, your Naturopathic Doctor may recommend, if you haven’t had it completed already, routine blood work check, a sonographic evaluation of your scrotum (which checks for any physical signs that may be causing reduced fertility), and a semen analysis (investigating sperm concentration, morphological features, sperm motility, DNA fragmentation).