title: Ultrasonography and missed ectopic pregnancies.
authors.forename: Timothy
authors.initials: T
authors.lastname: Jang
authors.forename: Sanford
authors.initials: S
authors.lastname: Sineff
authors.forename: Chandra
authors.initials: C
authors.lastname: Aubin
authors.forename: Rosanne
authors.initials: R
authors.lastname: Naunheim
mesh_terms: D003951:Diagnostic Errors; D004635:Emergency Medicine / Q000193:education*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000000981:diagnostic imaging*; D016216:Ultrasonography, Prenatal / Q000592:standards