title: [All rules have exceptions. Ectopic pregnancy in spite of negative HCG].
authors: Gynekologiska kliniken, S:t Görans sjukhus, Stockholm.
authors: F
authors: F
authors: Flam
authors: S
authors: S
authors: Lundberg
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000097:blood*; D003937:Diagnosis, Differential; D005187:Fallopian Tubes / Q000601:surgery; D005260:Female; D006801:Humans; D010535:Laparoscopy; D011247:Pregnancy; D011274:Pregnancy, Tubal / Q000097:blood / Q000175:diagnosis / Q000601:surgery; D014592:Uterine Hemorrhage / Q000175:diagnosis
chemical_list: D006063:Chorionic Gonadotropin