Guidelines for obstetrical scanning and reporting: the legal necessity.
D003675:Defensive Medicine; D004282:Documentation / Q000592:standards*; D005260:Female; D006801:Humans; D009774:Obstetrics / Q000592:standards*; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D014463:Ultrasonography / Q000592:standards*; D014481:United States