title: Serum and chorionic tissue concentrations of human chorionic gonadotropin and its subunits during pregnancy.
mesh_terms: D002823:Chorion / Q000378:metabolism*; D006063:Chorionic Gonadotropin / Q000097:blood / Q000378:metabolism*; D005321:Extraembryonic Membranes / Q000378:metabolism*; D005260:Female; D005612:Freeze Drying; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D013997:Time Factors
chemical_list: D006063:Chorionic Gonadotropin