hCG is a form of glycoprotein that is synthesised within the trophoblast cells of a [[Blastocyst_Embryonic_Development_-_Anatomy_%26_Physiology|blastocyst]]. In females the target tissue is the ovary where it results in the ovarian production of progesterone. In males hCG increases the growth of the foetal testes. | hCG is a form of glycoprotein that is synthesised within the trophoblast cells of a [[Blastocyst_Embryonic_Development_-_Anatomy_%26_Physiology|blastocyst]]. In females the target tissue is the ovary where it results in the ovarian production of progesterone. In males hCG increases the growth of the foetal testes. |