title: Difficulties in diagnosing ectopic pregnancy with pelvic ultrasound.
authors.affiliation: Tropical Public Health Unit, Cairns QLD.
authors.forename: D
authors.initials: D
authors.lastname: Harley
authors.forename: P
authors.initials: P
authors.lastname: Howat
mesh_terms: D000328:Adult; D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000652:urine; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D010535:Laparoscopy; D011247:Pregnancy; D011274:Pregnancy, Tubal / Q000000981:diagnostic imaging*; D016216:Ultrasonography, Prenatal
chemical_list: D018997:Chorionic Gonadotropin, beta Subunit, Human