When is CVS recommended?
Chorionic villus sampling is an early prenatal diagnostic test, usually performed between 11 and 14 weeks.
CVS samples a small quantity of placental tissue under continuous ultrasound guidance. Because placental cells share the same genetic makeup as the fetus, the sample can be used for karyotype, microarray or gene-specific testing.
Its main advantage is timing: results are available in the first trimester, which allows earlier answers and earlier decisions.
It is usually offered when
- First-trimester screening or NIPT shows high risk
- An abnormality is visible on the 11–14 week scan
- A specific single-gene condition runs in the family
- A previous pregnancy was affected by a genetic condition
Safety
In experienced hands, using real-time image guidance and careful needle planning, the procedure-related loss rate is low. Every procedure is planned around placental position, uterine anatomy and maternal comfort.
This page is general information and is not a substitute for a consultation. Every pregnancy is assessed individually.
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Consultations at Apollo Cradle, Apollo Fertility, AIFMRG and Epic International, Hyderabad.