title: What is the relationship between the universal use of ultrasound, the rate of detection of twins, and outcome differences?
authors.affiliation: New York Hospital/Cornell Medical Center, New York, USA.
authors.forename: S T
authors.initials: ST
authors.lastname: Chasen
authors.forename: F A
authors.initials: FA
authors.lastname: Chervenak
mesh_terms: D005314:Embryonic and Fetal Development; D004992:Ethics, Medical; D005260:Female; D006297:Health Services Accessibility; D006801:Humans; D007752:Obstetric Labor, Premature / Q000517:prevention & control; D010344:Patient Advocacy; D011247:Pregnancy; D011256:Pregnancy Outcome; D011272:Pregnancy, Multiple; D014427:Twins; D016216:Ultrasonography, Prenatal / Q000706:statistics & numerical data; D014481:United States