Ultrasound in pregnancy. Consensus statement, 1986. Norwegian Institute of Hospital Research.
D005260:Female; D006801:Humans; D008403:Mass Screening; D009664:Norway; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D013673:Technology Assessment, Biomedical; D014463:Ultrasonography / Q000592:standards*