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Doctor insights on: Chorionic Villus Sampling

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Dr. Kimberly Fortner
84 doctors shared insights

Chorionic Villi Sampling (Definition)

It is a small biopsy of the developing placenta taken to analyze the chromosomal makeup of that ...Read more


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What instruments are used to perform a chorionic villi sampling?

What instruments are used to perform a chorionic villi sampling?

Ultrasound: Ultrasound is used to assess the anatomy of the fetus and placenta. This allows directed placement of the biopsy needle to get a speciman. This is usually done under local anesthesia. ...Read more

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Does chorionic villi sampling determine whether a fetus has genetic abnormalities?

Does chorionic villi sampling determine whether a fetus has genetic abnormalities?

Yes and no: Chorionic villi sampling is a procedure where a small sample of cells from the placenta are removed, early in a pregnancy. A lab can determine if there are any extra or missing chromosomes, or large parts of a chromosome that are extra or missing. Other tests on chorionic villi can look for abnormalities in single genes, but no test can determine that a baby has no genetic abnormalities. ...Read more

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

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

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. ...Read more

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

CVS: Chorionic villus sampling is a procedure to obtain a small amount of tissue from the placenta. The placenta has the same genetic endowment as the fetus. So chromosomal or genetic testing of the chorionic villus will tell about the fetus. ...Read more

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I cannot find a doctor who is willing to perform chorionic villi testing. Any ideas why not? What are risks?

I cannot find a doctor who is willing to perform chorionic villi testing. Any ideas why not? What are risks?

Top caliber maternal: Fetal centers especially those with medical school affiliations should either perform chorionic villus sampling or be able to refer you to a center that does. There is a 1% risk of miscarriage & very minor risk of infection spotting pain or crampiing. Advantage over amniocentesis is that it can be performed earlier in pregnancy (10 -13 weeks after your last menstrual period). ...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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Chorionic villus sampling vs amniocentesis risk?

Chorionic villus sampling vs amniocentesis risk?

Risk: Risk of pregnancy loss with cvs and amniocentesis are equivalent. That's been shown by four different studies. In experienced hands the loss rate is something like 1 in 1600. ...Read more

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Why would a pregnant person need chorionic villus sampling (cvs)?

Why would a pregnant person   need chorionic villus sampling (cvs)?

Genetic testing: Chorionic villous sampling represents one of the earliest available methods to accurately diagnose genetic abnormalities such as down's syndrome. While most, if not all, of these defects are not curable, it does give the patient the earliest opportunity to decide on whether to continue the pregnancy. ...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

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

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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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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Which of the two tests are better? Or are recommended ? Amniocentesis or cvs (chorionic villus sampling )? No past history of any health problems.

It depends.: CVS is generally thought to have a slightly higher miscarriage rate than amniocentesis, but this may not be the case everywhere. For mor e information check this link: http://www.babycenter.com/0_chorionic-villus-sampling-cvs_328.bc?page=4#articlesection8 ...Read more