title: Naegele's rule: a reappraisal.
authors.forename: D J
authors.initials: DJ
authors.lastname: Hutchon
authors.forename: F
authors.initials: F
authors.lastname: Ahmed
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D008597:Menstrual Cycle; D011247:Pregnancy; D016216:Ultrasonography, Prenatal / Q000379:methods* / Q000592:standards