title: Trisomy 21 in the mid trimester: sonographic phenotyping of the fetus is the key.
authors.affiliation: Department of Obstetrics and Gynaecology, Universitaets-Frauenklinik, Sigmund Freud Strasse 25, D-53105 Bonn, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Hansmann
mesh_terms: D004314:Down Syndrome / Q000150:complications / Q000000981:diagnostic imaging* / Q000235:genetics; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging* / Q000235:genetics; D006801:Humans; D010641:Phenotype; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D016216:Ultrasonography, Prenatal / Q000379:methods*