The beta subunit of human chorionic gonadotropin (beta-hCG) refers to a specific component essential for the hormone's function. Synonyms for this term include beta-hCG subunit, human chorionic gonadotropin beta chain, and hCG beta chain. These synonyms reflect the various ways researchers and medical professionals may refer to this component during discussions, research, or clinical settings. Regardless of the terminology used, the beta subunit of human chorionic gonadotropin plays a crucial role in pregnancy by maintaining the corpus luteum and promoting the secretion of progesterone necessary for embryo implantation and fetal development.