title: Importance of minor markers on the second-trimester sonogram.
authors: David
authors: D
authors: Peisner
mesh_terms: D000328:Adult; D003376:Counseling; D004314:Down Syndrome / Q000000981:diagnostic imaging*; D005189:False Positive Reactions; D005260:Female; D006330:Heart Defects, Congenital / Q000000981:diagnostic imaging*; D006801:Humans; D010342:Patient Acceptance of Health Care; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D016216:Ultrasonography, Prenatal