title: One Norwegian national tool for estimating date of delivery and fetal age.
authors.forename: Torunn
authors.initials: T
authors.lastname: Janbu
mesh_terms: D015982:Bias; D036861:Delivery, Obstetric; D005260:Female; D005865:Gestational Age; D006801:Humans; D009664:Norway; D011247:Pregnancy; D012016:Reference Values; D015203:Reproducibility of Results; D016216:Ultrasonography, Prenatal