title: Confusion about the discriminatory zone and choriogonadotropin standards.
authors.forename: C
authors.initials: C
authors.lastname: Prosser
authors.forename: J
authors.initials: J
authors.lastname: Krahn
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood / Q000592:standards*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000175:diagnosis*; D014463:Ultrasonography
chemical_list: D006063:Chorionic Gonadotropin