Human Chorionic Gonadotropin (HCG) is a potent injectable hormone that imitates the action of luteinizing hormone (LH) in the body. It is frequently used to aid fertility in women, restore natural testosterone levels in men with low testosterone, and prevent testicular shrinkage during anabolic steroid cycles. HCG stimulates ovulation, increases testosterone production, supports testicular function, and improves sperm quality, making it an essential tool for maintaining hormonal balance and reproductive health in both men and women.