نتایج جستجو برای: chorionic villus sampling

تعداد نتایج: 220973  

Journal: :Hong Kong medical journal = Xianggang yi xue za zhi 2008
T N Leung

Chromosomal anomalies remain the commonest cause of mental retardation and congenital malformation. Traditionally, the prenatal diagnosis of chromosomal aberration relies on cytogenetic analysis of the cells obtained from amniocentesis or chorionic villus sampling (CVS). First, the amniotic fluid or chorionic villi samples need to be cultured for 14 days or more before adequate foetal cells can...

Journal: :Journal of medical genetics 1990
M B Qumsiyeh A T Tharapel L P Shulman J L Simpson S Elias

A 36 year old white female was referred for chorionic villus sampling for advanced maternal age. Direct (cytotrophoblast) preparations of chorionic villi were 45,X, but cultured mesenchymal core cells from the same villi were 46,XX. Study of embryonic and extraembryonic tissues showed the aneuploidy to be limited to cytotrophoblasts from specific placental sites. In aggregate, the cytogenetic f...

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