Male infertility and impotence is a very common symptom in men. The main cause from a Chinese perspective is an exhaustion of the yang energy in the kidneys The yang energy is controlled by the right kidney which needs to be warm and strong. Also the reserves or the yin energy with long term of over exhaustion and excessive sex can also get very depleted . Replenishing both kidneys sometimes requires the use of Chinese herbs to assist the treatment. Men with very weak sperm and sluggish sperm can get back to a good healthy state with the right treatment.
The other organ that helps male infertility and impotence is the liver. The kidneys are the storehouse of the energy and the health of the liver helps that energy Express itself outwardly. Stronger sexuality is born out of strong harmony between the kidneys and the liver.
This depends on the reason and energy of the individual and can vary from a few weekly sessions to a few months.
You can read more about acupuncture for male infertility here and other factors that help.