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Genetics  (Expert Forum)
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Can Amniocentesis give a definitive answer for Mosaic?
Welcome to the Genetics Forum! Questions in the Genetics Forum are being answered by genetic experts from AccessDNA. This forum is for questions and support regarding a person’s predisposition to a variety of medical conditions such as Ashkenazi Jewish Diseases, Bleeding Disorders, Blood Clotting Disorders, Cancer Genetics and Hereditary Cancer Syndromes, Chromosome Abnormalities, Congenital Birth Defects, Cystic Fibrosis, Family History, Fragile X Syndrome, Infertility, Newborn Screening, Rare Genetic Disorders, Prenatal Screening and Testing. This forum is for questions and support regarding a person’s predisposition to a variety of medical conditions such as Alzheimer’s Disease, Blood-clotting Disorders, Breast Cancer, Cystic Fibrosis, Diabetes, Marfan Syndrome, Ehlers-Danlos Syndrome, etc.

Can Amniocentesis give a definitive answer for Mosaic?

by Edward18, Jun 05, 2009 07:59AM
A CVS test has confirmed mosiac trisomy 18 present in my placenta.  Numerous scans (16 weeks is the latest) has shown no physical abnormalities in the fetus.  Amniocentesis has been recommended to confirm that the fetus is unaffected.  However due to the nature of a mosaic (does not affect all cells by definition) can this test give a result with 100% confidence that the fetus is either affected or not?  Surely it can only tell if the skin does not contain the mosaic?
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