ACOG Practice Bulletin No. 58. Ultrasonography in pregnancy.
D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging; D005317:Fetal Growth Retardation / Q000000981:diagnostic imaging; D005320:Fetal Macrosomia / Q000000981:diagnostic imaging; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D011786:Quality Control; D016216:Ultrasonography, Prenatal / Q000592:standards