title: Crown-rump length dating of pregnancy at less than nine weeks' gestation.
authors.forename: A V
authors.initials: AV
authors.lastname: Cadkin
mesh_terms: D001827:Body Height; D004622:Embryo, Mammalian / Q000033:anatomy & histology*; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy