title: First trimester diagnosis of holoprosencephaly with a Dandy-Walker malformation by transvaginal ultrasonography.
mesh_terms: D000328:Adult; D003616:Dandy-Walker Syndrome / Q000000981:diagnostic imaging*; D005260:Female; D005317:Fetal Growth Retardation / Q000000981:diagnostic imaging*; D016142:Holoprosencephaly / Q000000981:diagnostic imaging*; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D016216:Ultrasonography, Prenatal / Q000379:methods