HCG, also known as Human Chorionic Gonadotropin, is a hormone that is produced by pregnant women by the placenta. It is a glycoprotein that is made up of 244 amino acids. HCG also helps the body create progesterone and helps line the uterus with a thick wall of blood vessels and capillaries to assist the growing fetus. HCG has been used to treat infertility in women and to increase sperm count in men. It has been found that HCG regulates the brain set point for hunger and also how your body metabolizes fat. HCG alerts the body to release stored fat when needed. This is apparent in pregnant women who have severe morning sickness or live an unhealthy lifestyle. They are still able to go full term and have a healthy baby.