Hypogonadism is a medical term which describes a diminished functional activity of the Testicles which results in diminished Sex Hormone Biosynthesis. The production of Sperm may be impaired by Hypogonadism, which, depending on the degree of severity, may result in partial or complete Infertility. Hypogonadism can cause reduced body hair and beard, enlarged breasts, loss of muscle mass, Erectile Dysfunction, loss of libido, weakness and fatigue. The diagnosis is confirmed by performing blood tests to diagnose a low Testosterone level. Once confirmed, replacement options include Testosterone Injections vs. Testosterone Pellet Insertion vs. Testosterone Gel Application.