HCG 5000 refers to the dosage toughness (5000 IU) of Human Chorionic Gonadotropin (HCG), a hormone generated throughout pregnancy. In health care and Conditioning contexts, it's useful for several applications: exactly what is HCG? Human Chorionic Gonadotropin (HCG) is a hormone In a natural way made by the placenta for the duration of pregnancy.