Indications
Possible reasons for having a CVS can include:
- Abnormal first trimester screen results
- Increased nuchal translucency or other abnormal ultrasound findings
- Family history of a chromosomal abnormality or other genetic disorder
- Parents are known carriers for a genetic disorder
- Advanced maternal age (maternal age above 35). AMA is associated with increase risk of Down's syndrome and at age 35, risk is 1:400. Screening test are usually carried out first before deciding if CVS should be done.
Read more about this topic: Chorionic Villus Sampling
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