HCG – 5000iu is a naturally occurring placental glycoprotein hormone that binds to luteinizing hormone receptors (LHCGR) to stimulate reproductive hormone production. Research explores its role in steroidogenesis, oocyte maturation, angiogenesis, and reproductive endocrinology. Structurally, it is a disulfide-rich heterodimer with a unique beta subunit that extends its half-life, enhancing stability and bioavailability.