title: Recurrent low second-trimester hCG.
authors.forename: R G
authors.initials: RG
authors.lastname: Best
authors.forename: J G
authors.initials: JG
authors.lastname: Edwards
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D000509:alpha-Fetoproteins / Q000378:metabolism
chemical_list: D006063:Chorionic Gonadotropin; D000509:alpha-Fetoproteins