title: Direct chromosome preparations from chorionic villi: a method for obtaining extended chromosomes and recognizing mosaicism confined to the placenta.
abstract: A modified technique is described for obtaining extended metaphase chromosomes (600 bands) from direct preparations of chorionic villi, allowing rapid detection of subtle structural aberrations with minimal risk of maternal-cell contamination. Analysis of multiple individually processed villus fragments may be helpful in recognizing mosaicism confined to chorionic villi.
mesh_terms: D002824:Chorionic Villi / Q000648:ultrastructure*; D002871:Chromosome Banding; D005260:Female; D006801:Humans; D007621:Karyotyping; D009030:Mosaicism; D011247:Pregnancy