title: Delayed diagnosis of advanced combined pregnancy.
authors.forename: M L
authors.initials: ML
authors.lastname: Reuss
mesh_terms: D000005:Abdomen; D000328:Adult; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000175:diagnosis* / Q000453:epidemiology; D013997:Time Factors; D014427:Twins; D014463:Ultrasonography