title: Routine obstetric ultrasound.
abstract: Routine ultrasound may have a positive effect on obstetric outcome when determination of gestational age and placental localization are combined with evaluation for multiple gestation, congenital anomalies and growth retardation. The potential risk and benefit of obstetric ultrasound must be better understood before this procedure is used as a screening tool in large populations.
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis; D005317:Fetal Growth Retardation / Q000175:diagnosis; D005865:Gestational Age; D006801:Humans; D010920:Placenta / Q000033:anatomy & histology; D010923:Placenta Previa / Q000175:diagnosis; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014427:Twins; D014463:Ultrasonography