title: Diagnostic criteria for nonviable pregnancy early in the first trimester.
authors.affiliation: *Brigham and Women's Hospital and Harvard Medical School; †Queen Charlotte's and Chelsea Hospital, Imperial College, London, UK; and ‡University of South Carolina.
authors.forename: Peter M
authors.initials: PM
authors.lastname: Doubilet
authors.forename: Carol B
authors.initials: CB
authors.lastname: Benson
authors.forename: Tom
authors.initials: T
authors.lastname: Bourne
authors.forename: Michael
authors.initials: M
authors.lastname: Blaivas
mesh_terms: D000465:Algorithms; D018568:Crown-Rump Length; D005189:False Positive Reactions; D005260:Female; D005313:Fetal Death; D005328:Fetal Viability; D058746:Gestational Sac / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D017410:Practice Guidelines as Topic; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D018570:Risk Assessment; D016216:Ultrasonography, Prenatal / Q000379:methods* / Q000592:standards*