Beta-Human Chorionic Gonadotropin (β-HCG) is a glycoprotein hormone produced primarily by the placenta during pregnancy. It comprises two subunits: alpha and beta, with the beta subunit conferring biological specificity. (β-HCG) plays a critical role in maintaining the corpus luteum, supporting progesterone production in early pregnancy. In diagnostics, the beta subunit is preferred for its high specificity compared to intact (β-HCG).