Human Chorionic Gonadotropin (hCG) is a hormone produced by the placenta during pregnancy. However, in the context of medical treatment, it is utilized for its role in fertility and testosterone production. For women, hCG is used to stimulate ovulation, aiding in conception. In men, hCG mimics luteinizing hormone (LH), a natural hormone that induces the testes to produce testosterone. This property makes hCG an essential component in treating conditions like hypogonadism, where the body's natural testosterone production is insufficient. By stimulating the Leydig cells in the testes to produce testosterone, hCG therapy can help restore normal levels of this crucial hormone, improving symptoms associated with testosterone deficiency such as reduced libido, decreased muscle mass, and energy levels. Additionally, hCG is used in specific fertility treatments to enhance sperm production. Its application must be carefully managed under medical supervision to optimize benefits and minimize potential side effects.