HCG 5000 refers to a dosage strength (5000 IU) of Human Chorionic Gonadotropin (HCG), a hormone made all through pregnancy. In clinical and here Conditioning contexts, it is useful for a variety of reasons: what on earth is HCG? Human Chorionic Gonadotropin (HCG) is actually a hormone naturally made by the placenta for the duration of pregnancy.