8 doctors weighed in:

How would chorionic villi sampling determine whether a fetus has genetic abnormalities?

8 doctors weighed in
Dr. Ira Salafsky
Clinical Genetics
5 doctors agree

In brief: Laboratory testing

Cvs sampling after 10 weeks of gestation can obtain tissue for testing.
The tests usually done are chromosomal analysis or mutational analysis of a specific gene.

In brief: Laboratory testing

Cvs sampling after 10 weeks of gestation can obtain tissue for testing.
The tests usually done are chromosomal analysis or mutational analysis of a specific gene.
Dr. Ira Salafsky
Dr. Ira Salafsky
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1 doctor agrees

In brief: Karyotype

CVS is like having an amniocentesis only done earlier and with material directly obtained from the placenta.
The material is tested for chromosomal abnormalities and may be subjected to more specific testing if there is a known genetic disorder in the family. It carries a slightly higher risk of miscarriage than amniocentesis. CVS will not detect neural tube defects (i.e. spina bifida )

In brief: Karyotype

CVS is like having an amniocentesis only done earlier and with material directly obtained from the placenta.
The material is tested for chromosomal abnormalities and may be subjected to more specific testing if there is a known genetic disorder in the family. It carries a slightly higher risk of miscarriage than amniocentesis. CVS will not detect neural tube defects (i.e. spina bifida )
Dr. Lois Freisleben-Cook
Dr. Lois Freisleben-Cook
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