title: Routine ultrasound dating has not been shown to be more accurate than the calendar method.
authors.forename: B
authors.initials: B
authors.lastname: Backe
authors.forename: J
authors.initials: J
authors.lastname: Nakling
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D008598:Menstruation; D011247:Pregnancy; D012680:Sensitivity and Specificity; D016216:Ultrasonography, Prenatal / Q000592:standards*