If necessary this test is performed between 10 and 12 weeks of pregnancy and can indicate the same chromosomal abnormalities and genetic disorders as amniocentesis can. It also can detect the baby's sex and risk of spina bifida.
Prenatal diagnostic procedure in which tissue from villi (hairlike projections of the membrane surrounding the embryo) is analyzed for birth defects.
Chorionic villus sampling is an antenatal screening test for genetic conditions such as Down’s syndrome. A sample of the placenta is removed using a fine needle guided by ultrasound. It is usually carried out at about 12 weeks of pregnancy.
A procedure for obtaining cells of the chorion to enable testing of the fetus for specific abnormalities. Samples of the cells may be taken through the vagina or through the abdomen of the pregnant mother: it is usually carried out in the 10th - 12th week of pregnancy (see Genetics Fact Sheet 15: Prenatal Testing and Screening for Fetal Abnormalities).
(CVS) A test done at about 9 weeks pregnancy at which, under the guidance of transvaginal ultrasound, a catheter is passed through the cervix of the pregnant uterus to obtain a small sample of tissue from the placenta (the afterbirth) for genetic testing, such as a karyotype.
A procedure that removes a small sample of chorionic villi cells from the placenta where it joins the uterus, to test for chromosome abnormalities such as Down syndrome
Removal of cells that line the placenta, the chorionic villi, through the cervix using a catheter or through the abdomen using a needle. The material obtained may be tested for Down syndrome and other disorders. The procedure is usually performed between the 10th and 12th weeks of pregnancy .
A medical procedure to test for genetic abnormalities in a fetus. Cells derived from the embryo are suctioned from the villi (extensions of the chorionic membrane surrounding the placenta) and examined. This alternative to amniocentesis can be done somewhat earlier and results are faster, but it is riskier for the fetus.
A diagnostic procedure whereby a small piece of placental tissue (chorionic villi) is taken during early pregnancy to test for chromosomal abnormalities.+ Associated link: http://www.nlm.nih.gov/medlineplus/ency/article/003406.htm
A method of diagnosing abnormalities in a foetus, done at 8-10 weeks of pregnancy, in which a small sample of chorionic tissue is taken from the placenta for laboratory analysis
A prenatal test performed by removing a small sample of the placenta from the uterus with either a catheter (a thin flexible tube) or a needle. The sample can be tested for genetic abnormalities. Chorionic villus sampling is usually done between the 10th and 12th weeks of pregnancy.
a prenatal test to detect birth defects at an early stage of pregnancy; tissue from the chorionic villi is assayed
a similar procedure that involves taking a sample of the fluid in the sac surrounding the fetus
A test carried out at or after the 10th week of pregnancy, in which a few cells of the placenta are removed for biochemical or genetic testing.
a prenatal test in which small pieces of the placenta are removed to genetically test the fetus.
A procedure in which a small sample of cells are taken from the placenta through a small catheter placed up through the vagina and the cervix. This is done earlier in pregnancy than amniocentesis and is used to test for chromosomal and other biochemical abnormalities that may affect the health and well being of the baby.
A method of diagnosing fetal defects in which a small amount of tissue is taken from the placenta and analyzed for abnormalities.
A procedure in which a small sample of cells is taken from the placenta and tested.
a prenatal test performed during the first trimester of pregnancy to check for abnormalities in the fetus.
a prenatal test usually done in the 1st trimester to detect fetal abnormalities. A small piece of the developing placenta is withdrawn; because this has the same genetic make-up as the developing fetus, it can be used for genetic or chromosome tests.
A procedure for taking a small piece of placental tissue (chorionic villi) from the uterus in early pregnancy to check for the presence of genetic defects in the fetus. CVS can be performed through the cervix or the abdomen.
An antenatal test involving a needle aspiration through the uterus to obtain a sample of the placental tissue. This test is used to detect genetic or spinal defects, if there are high risk factors present.
An alternative to amniocentesis to detect chromosomal abnormalities. The CVS can be performed earlier in fetal development than amniocentesis, and thereby allows earlier diagnosis.
A procedure in which a small sample of cells is taken from the placenta early in a pregnancy for chromosomal testing.
A procedure used in prenatal diagnosis to look at the chromosomes of the developing fetus. A sample is removed from the chorion, which is part of the placenta and contains cells from the fetus. This sample can then be analyzed by karyotype to look for changes in the chromosomes. The procedure can be done at 10 to 12 weeks into the pregnancy. There is a 1% risk of miscarriage associated with this procedure, which means one in 100 women will miscarry following this procedure.
A prenatal diagnostic technique to obtain fetal cells from the placenta. This can be performed several weeks earlier than amniocentesis, albeit with a somewhat higher risk of procedure related complications.
A test to obtain cells from the developing placenta. Done early in pregnancy, between 10 and 12 weeks.
Removal of a small amount of tissue from the placenta to test for chromosomal or metabolic abnormalities; usually performed between weeks 10–12
A procedure used in prenatal diagnosis to obtain cells (chorionic villi) that are fetal in origin from the placenta for analysis.
A procedure used for prenatal diagnosis. The CVS procedure involves the insertion of a needle through the abdomen into fingerlike projections of the placenta which are called chorionic villi. This procedure is also performed while using ultrasound as guidance. The chorionic villi obtained is used for DNA testing. CVS is usually performed at 10 to 12 weeks of pregnancy.
A procedure performed via the cervix between the 10th and 12th week of pregnancy to detect genetic defects in the fetus. Cells taken from the chorion - a layer of embryonic tissue surrounding the fetus - are analyzed.
A few cells are taken from the edge of the placenta and tested for signs of certain inherited disorders.
a procedure for prenatal diagnosis where a small amount of tissue from the developing placenta is withdrawn. The chorionic villi are made up of cells that develop from the same fertilized egg cell as the fetus. This test is usually performed at 10-12 weeks, counting from the first day of the last menstrual period, and may be done in a doctor's office or hospital setting. CVS is an earlier alternative to amniocentesis but the risk for complications is slightly higher.
A medical procedure in which a small sample of the placenta (tissue providing nourishment for an unborn baby) is taken from the uterus and sent to a laboratory for evaluation.
A test in which the tissue surrounding the outer membrane of the embryo is analysed for genetic handicap. Also known as CVS.
An invasive prenatal diagnostic procedure involving removal of villi from the human chorion to obtain chromosomes and cell products for diagnosis of disorders in the human embryo.
A prenatal test in which cells surrounding an embryo are removed in order to examine the chromosomes.
An early genetic screening test -- usually given between the 10th and 12th weeks of pregnancy. In CVS, some of the cells that line the placenta, the chorionic villi, are removed through the cervix or abdomen with a needle or catheter and screened for Down syndrome and other abnormalities.
If necessary this test is performed between 10 and 12 weeks of pregnancy and can indicate the same chromosomal abnormalities and genetic disorders as amniocentesis can. (Read about " Pregnancy Testing")
(CVS) A technique used in antenatal diagnosis where a small amount of placental tissue is removed at about 8 - 9 weeks of gestation by transcervical aspiration.
diagnostic test usually performed between the 10th and 12th weeks of pregnancy in which a small sample of tissue is taken from the placenta and examined to detect genetic abnormalities in a fetus.
A prenatal test to detect birth defects that is performed at an early stage of pregnancy. It involves using a needle to retrieve placental cells for testing.
A prenatal test to detect chromosomal abnormalities in which cells from the placenta are analyzed. CVS can be done at 10 to 12 weeks of pregnancy.
A procedure which involve taking a biopsy from the placenta to test the fetus for genetic abnormalities. It is usually carried out under ultrasound scan at about eleven weeks of pregnancy. The placenta has the same genetic make-up as the baby. There is a 2-3% risk of the procedure causing a miscarriage.
Removal of chorionic villi for prenatal testing. The chorionic villa are cells situated on the wall of the uterus (womb) which form the early placenta (afterbirth). They have the same genetic make-up as the unborn baby and can be tested to detect certain abnormalities.
An early genetic diagnostic test, usually given between weeks 10 and 13 of pregnancy. A small amount of tissue from the cells that line the placenta (called the chorionic villi) are removed through the cervix or abdomen with a needle and screened for Down syndrome and other abnormalities.
taking a biopsy of the placenta, usually at the end of the second month of pregnancy, to test the fetus for genetic abnormalities
a prenatal test in which a soft, thin tube is inserted through the cervix, or a needle through the abdomen, to the chorionic villi, the embryonic tissue that forms the placenta, to withdraw a tissue sample for chromosomal and genetic analysis. This can be performed as early as 10-12 weeks' gestation.
a procedure for obtaining a small sample of tissue from the placenta (chorionic villi) for the purpose of prenatal diagnosis of genetic disorders. CVS can be performed between 9 to 12 weeks of pregnancy.
A medical procedure that extracts a portion of the outermost membrane surrounding the fetus to enable genetic and biochemical analysis.
a procedure where a small portion of the placenta is removed during pregnancy in order to examine the baby’s chromosomes and look for some genetic diseases.
CVS is an alternative to amniocentesis. The advantage is that it can be done earlier, between the 10th and 12th seeks of pregnancy. The results, which provide information about the baby's chromosomes, are usually available within seven days. In CVS, a small amount of tissue is withdrawn from the developing placenta with a thin catheter that is usually inserted through the cervix into the placenta under ultrasound guidance. It may also be performed transabdominally with a needle similar to the one used in an amniocentesis. The procedure is brief and causes minimal discomfort to the patient. The National Institute of Child Health and Human Development panel reviewed the safety of CVS and concluded that the evidence to date does not establish a cause-and-effect relationship between CVS and fetal abnormalities. The procedure is considered safe and poses minimal risk to the pregnancy.
Procedure using ultrasound guidance to obtain chorionic villi from the chorion frondosum for prenatal diagnosis.
A technique which takes a small amount of trophoblastic tissue from the placenta. Because this tissue sample will contain villi derived from the foetus, it can be checked for chromosomal abnormalities.
A prenatal test in which chorionic villi, microscopic, fingerlike projections that make up the placenta, are removed from the placenta and screened for genetic defects.
Chorionic villus sampling is a test during pregnancy to see if there are any genetic problems with the foetus. A small sample of tissue is taken from the placenta.
Prenatal invasive procedure to sample a small amount of chorionic villi (developing into the placenta) to analyse the fetal chromosomes.
Method of sampling fetal chorionic cells. Used to diagnose embryonic genetic and developmental disorders.
CVS or Chronionic Villus Sampling is a procedure done early in pregnancy where tissue is taken from the inside of the uterus through the cervix, to test for chromosome abnormalities such as Down Syndrome
used to detect fetal genetic abnormalities. A catheter is inserted through the cervix and into the placenta between the uterus lining and the chorion. A villi sample is taken and its chromosomes are evaluated. Done in the 10th/11th week of pregnancy.
Chorionic villus sampling is a prenatal test that can be done earlier than amniocentesis. It is performed on pregnant women who are at risk for carrying a foetus with a genetic or chromosomal defect.
placental tissue that is sometimes retrieved for laboratory analysis. Cells from this tissue can be tested for certain genetic abnormalities and chromosomal disorders.
(CVS) - This procedure tests for genetic fetal defects by analyzing a piece of chorion, which is the outer tissues of the sac surrounding the embryo. CVS can be done earlier than amniocentesis, typically between 9 and 11 weeks of pregnancy.
A procedure in which a small sample of cells are removed from the placenta where it joins the uterus. Used to test for chromosome abnormalities such as Down syndrome in the fetus.
Chorionic villus sampling (CVS) is a form of prenatal diagnosis to determine genetic abnormalities in the fetus. It entails getting a sample of the chorionic villus (placental tissue) and testing it. It is generally carried out only on pregnant women over the age of 35 and those who have a higher risk of Down syndrome and other chromosomal conditions.