Chorionic Villus Sampling (CVS) is an advanced prenatal diagnostic test that helps detect genetic and chromosomal abnormalities at an early stage of pregnancy.
At Shree Diagnostics, Howrah, we provide expert-guided CVS testing with complete safety, counseling, and reliable reporting.
What is CVS (Chorionic Villus Sampling)?
CVS is a diagnostic procedure in which a tiny sample of placental tissue (chorionic villi) is collected for genetic testing.
These cells contain the baby’s DNA and can identify many genetic and chromosomal conditions much earlier than amniocentesis.
CVS provides definitive results, not just screening.
When is CVS Recommended?
Doctors recommend CVS when there is a need for early diagnosis, usually between 11–14 weeks of pregnancy.
You may be advised CVS if:
✔ NIPT test is high-risk
✔ Double Marker Test shows abnormal values
✔ NT Scan shows increased thickness
✔ Previous pregnancy had a chromosomal disorder
✔ Family history of genetic conditions
✔ Parents are carriers of inherited diseases
✔ Mother’s age ≥ 30 years
✔ Certain abnormalities seen in early ultrasound
CVS is preferred when parents want early confirmation before entering the second trimester.
What CVS Can Detect
CVS helps diagnose:
✔ Chromosomal Disorders
- Down Syndrome (Trisomy 21)
- Edwards Syndrome (Trisomy 18)
- Patau Syndrome (Trisomy 13)
✔ Genetic Disorders
- Thalassemia
- Sickle Cell Disease
- Cystic Fibrosis
- Muscular Dystrophy
- Tay-Sachs Disease
- Other inherited metabolic disorders
✔ Sex Chromosome Abnormalities
- Turner Syndrome
- Klinefelter Syndrome
CVS gives near 100% accurate results because it evaluates the baby’s genetic material directly.
Types of CVS Procedure
There are two approaches, both done under continuous ultrasound guidance:
1. Transabdominal CVS
A thin needle is inserted through the abdomen to collect the sample.
(Painless and commonly performed)
2. Transcervical CVS
A thin catheter is passed through the cervix to reach the placenta.
(Used only when placental position is more accessible from below)
The doctor chooses the safest method based on the placental location.
How CVS is Performed
- Ultrasound evaluation to check placental position
- Skin or cervix cleaning to maintain sterile environment
- Needle or catheter insertion under ultrasound guidance
- Chorionic villi sample collection
- Monitoring of fetal heartbeat and maternal comfort
The procedure usually takes 15–20 minutes.
Is CVS Safe?
CVS is generally safe when performed by experienced specialists.
However, it carries minor risks:
- Mild cramping or discomfort
- Light spotting (in transcervical approach)
- Very small risk of miscarriage (0.1–0.2% in modern practice)
At Shree Diagnostics, strict safety protocols and ultrasound precision minimize risks.
Difference Between CVS and Amniocentesis
| Feature | CVS | Amniocentesis |
|---|---|---|
| When Done | 11–14 weeks | 15–20 weeks |
| Sample | Placental tissue | Amniotic fluid |
| Accuracy | Near 100% | Near 100% |
| Detects | Chromosomal + Genetic conditions | Chromosomal + Genetic + NTDs |
| Risk | Very low | Very low |
| Advantage | Earlier diagnosis | Detects neural tube defects |
CVS = best for early confirmation
Amniocentesis = best when later diagnosis is needed
After the Procedure – Recovery Tips
- Rest for 24 hours
- Avoid heavy work for 1–2 days
- Report any severe cramping, leakage, or fever (rare)
Most mothers resume normal routine quickly.
Why Choose Shree Diagnostics for CVS Test?
At Shree Diagnostics, we ensure:
✔ Experienced specialists for CVS procedure
✔ High-quality ultrasound guidance
✔ Sterile and safe environment
✔ Advanced lab support for gene/chromosome testing
✔ Clear counseling before and after the test
✔ Timely, accurate reporting
📍 Rabindra Nagar Complex, 88 College Road, Shalimar Gate No-3, Shalimar, Howrah – 711103
📍 58/3 Laxmi Narayan Tala Road, Howrah-711103
📞 8910830805 / 8100606500
🌐 www.shreediagnostics.in
