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Doctor insights on: Ultrasound Guided Chorionic Villus Sampling

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What is the definition or description of: ultrasound-guided chorionic villus sampling?

What is the definition or description of: ultrasound-guided chorionic villus sampling?

Looks at chomosomes: Chorionic villus sampling enables a doctor to remove a small sample of the tissue that surrounds the early sac of pregnancy. This, then, allows the study of the chomosomes - for early diagnosis of conditions such as down syndrome (an extra chromosome #21). It is done with ultrasound guidance at roughly 11 weeks of pregnancy. Amniocentesis is a procedure done later in pregnancy for the same reason. ...Read more

Dr. Michael Gabor
2,155 doctors shared insights

Sonogram (Definition)

The sonogram is a test that looks at body organs with no radiation. It uses sound waves and can give us a 2 dimensional view of organs such as the kidney, liver, heart, and lungs. It can define spaces that are either solid or full of fluid. I can also guide large needles into an organ or near the spine, and can help define the area being cut open. Its a ...Read more


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Someone here please explain the difference between chorionic villus sampling and amniocentesis?

Someone here please explain the difference between chorionic villus sampling and amniocentesis?

Placenta vs fluid: Cvs can usually be done earlier and involves obtaining placental tissue for chromosome analysis. This is done by needle biopsy either through the cervix or abdomen. Amniocentesis is obtaining amniotic fluid for testing also by needle aspiration. Both are done with ultrasound guidance, cvs slightly riskier with bleeding & cramping, both safe to do, both done by mfm docs. I hope that helps. ...Read more

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Can I do chorionic villus sampling in the first trimester?

Can I do chorionic villus sampling in the first trimester?

Yes: Chorionic villus sampling (cvs) is done in the first trimester between 10-12 weeks. It has a slightly higher risk of miscarriage associated with it than an amniocentesis- which is usually done after 15 weeks- because it is performed earlier in the pregnancy. Blood tests and a nuchal translucency ultrasound are noninvasive genetic screening options. ...Read more

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At what stage is chorionic villus sampling done?

At what stage is chorionic villus sampling done?

10-12 weeks: Chorionic villus sampling (cvs) obtains cells from the fetoplacenta for testing at 10-12 weeks of pregnancy, amniocentesis obtains fetal skin/urine cells at 16-18 weeks. Higher risks for miscarriage (2-3% for cvs, <0.5% or negligible for amnio) balance against the cvs advantage of testing before a women "shows, " preserving the privacy of pregnancy (testing). ...Read more

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How, when is chorionic villus sampling performed?

How, when is chorionic villus sampling performed?

First trimester: Cvs can be performed as early as 9 to 12 weeks of gestation - compared to amniocentesis that is usually done at 1bout 15 weeks. ...Read more

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Do I have to see a specialist to get a chorionic villus sampling cvs ordered?

YES!!: You need a specialist, a maternal-fetal expert, also called a perinatologist to do this. Your OB can order it, but you need a specialist with experience & skills to minimize risks to your fetus. ...Read more

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Which specific doctors perform a chorionic villus sampling test?

Which specific doctors perform a chorionic villus sampling test?

MFMs: Your obstetrician would refer you to a maternal-fetal medicine specialist (perinatologist) or you may have one already if a prior pregnancy or other circumstances caused your current pregnancy to be high risk. ...Read more

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What types of doctors perform a chorionic villus sampling test? Fellows?

What types of doctors perform a chorionic villus sampling test? Fellows?

MFMs: Maternal fetal medicine specialists usually perform cvs, although there are occasional doctors of other specialties who have been trained to do the procedure. Fellows, who are still in training, may perform the procedure under the supervision of the doctor who is teaching them. ...Read more