title: Routine ultrasound dating has not been shown to be more accurate than the calendar method.
authors.affiliation: The Nordic Cochrane Centre, Copenhagen, Denmark.
authors.forename: O
authors.initials: O
authors.lastname: Olsen
authors.forename: J
authors.initials: J
authors.lastname: Aaroe Clausen
mesh_terms: D005260:Female; D005306:Fertilization; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D016032:Randomized Controlled Trials as Topic; D012680:Sensitivity and Specificity; D013997:Time Factors; D016216:Ultrasonography, Prenatal / Q000592:standards*