title: False positive diagnosis of conjoined twins in the first trimester.
authors.forename: J L
authors.initials: JL
authors.lastname: Weiss
authors.forename: P C
authors.initials: PC
authors.lastname: Devine
mesh_terms: D000328:Adult; D003951:Diagnostic Errors; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D014102:Torsion Abnormality / Q000000981:diagnostic imaging; D014428:Twins, Conjoined; D014430:Twins, Monozygotic; D018615:Ultrasonography, Doppler, Color / Q000379:methods; D016216:Ultrasonography, Prenatal / Q000592:standards*; D014470:Umbilical Cord / Q000000981:diagnostic imaging*