title: First trimester fetal karyotyping using chorionic villi: technical development and diagnostic application.
mesh_terms: D002824:Chorionic Villi / Q000648:ultrastructure*; D002869:Chromosome Aberrations / Q000175:diagnosis; D025063:Chromosome Disorders; D005260:Female; D005865:Gestational Age; D006801:Humans; D007621:Karyotyping / Q000379:methods; D011247:Pregnancy; D011296:Prenatal Diagnosis