title: Gestational age: what to measure and when.
authors.affiliation: Department of Radiology, Thomas Jefferson University Hospital, Jefferson Medical College, Philadelphia, PA 19107-5244.
authors.forename: L
authors.initials: L
authors.lastname: Blum
authors.forename: A B
authors.initials: AB
authors.lastname: Kurtz
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D016216:Ultrasonography, Prenatal / Q000379:methods*