title: [How do we determine the duration of pregnancy?].
authors.affiliation: Kvinneklinikken, Haukeland sykehus, Bergen.
authors.forename: P
authors.initials: P
authors.lastname: Bergsjø
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D016216:Ultrasonography, Prenatal
vernacular_title: Hvordan bestemmer vi svangerskapets varighet?