Substance: Human Chorionic Gonadotropin HCG "Human Chorionic Gonadotropin" drug is not a steroid but it is widely used in athletics today. HCG is a natural protein hormone secreted by the human placenta and purified form the urine of pregnant women. This hormone is not a natural male hormone but mimics the natural hormone LH (Luetinising Hormone) almost identically. This LH stimulates the production of testosterone by the testis in males. Thus HCG sends the same message and results in increased testosterone production by the testis due to HCG’s effect on the leydig cells of the testis. Normally this HCG is used to treat women with certain ovarian disorders and it is used to stimulate the testis of men who may be hypogonadal. Athletes use HCG to increase the body’s own natural production of testosterone which is often depressed by ...