Many couples in modern societies experience great problems with fertility. Women suffer from many disturbances of their reproductive system, but also men are less fertile. The quality of semen deteriorated dramatically during last years. Diminished fertility is a source of many psychological nd social problems. This article shows results of clinical trials researching the effectiveness of acupuncture in the treatment of reproductive system in men. The beneficial influence of acupuncture on the production of semen as well as its effectiveness in treating prostate diseases are presented.