Human Chorionic Gonadotropin (hCG) is also known as the "pregnancy hormone" as
it is produced once a woman becomes pregnant. It can be detected both in the urine and in the blood, is produced by the early
placenta and keeps the corpus luteum producing progesterone when conception occurs. The purpose of hCG is to keep estrogen
and progesterone at their appropriate levels until the placenta has developed enough to take over this function.