title: Appropriate use of ultrasound in early pregnancy.
authors.forename: R A
authors.initials: RA
authors.lastname: Filly
mesh_terms: D004622:Embryo, Mammalian / Q000033:anatomy & histology; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D014463:Ultrasonography