Human Chorionic Gonadotropin (HCG) is what is known as a protein hormone (or a peptide hormone) that is naturally and endogenously produced by the female human body by the syncytiotrophoblast cells in the placenta. In females, HCG plays a very important role in stimulating the release of Progesterone, which is a hormone vitally essential for pregnancy. HCG that is bottled for human use is not synthesized in creation, but is instead obtained from humans.
