GO:0038106

Interacting selectively and non-covalently with choriogonadotropin hormone, a heterodimer, with an alpha subunit identical to that of luteinizing hormone (LH), follicle-stimulating hormone (FSH) and thyroid-stimulating hormone (TSH), and a unique beta subunit. [GOC:BHF, GOC:rl, Wikipedia:Human_chorionic_gonadotropin]