title: Ectopic pregnancy: diagnosis by sonography correlated with quantitative HCG levels.
authors.forename: K
authors.initials: K
authors.lastname: Carter
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000097:blood / Q000175:diagnosis*; D012016:Reference Values; D014463:Ultrasonography
chemical_list: D006063:Chorionic Gonadotropin