chorionic villus sampling

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chorionic villus sampling

chorionic villus sampling (CVS) or chorionic villus biopsy (CVB) , diagnostic procedure in which a sample of chorionic villi from the developing placenta is removed from the uterus of a pregnant woman (see pregnancy ) using a fine needle inserted through the abdomen or a thin plastic catheter inserted into the vagina and through the cervix. Chorionic villi are fingerlike projections of a membrane (the chorion) that surrounds the fetus. The villi develop from the fertilized ovum , or egg, and have a genetic composition similar to that of the fetus. Cells in the sample are grown in the laboratory and studied to detect the presence in the fetus of such genetic birth defects as Tay-Sachs disease and Down syndrome . The sex of the child can also be ascertained. Although CVS tests for the same range of abnormalities as amniocentesis , it is usually performed some weeks earlier (between the 8th and 12th weeks of pregnancy), and the results are available in a few days. It is recommended if the parents are carriers of certain genetic diseases, if there is a family history of genetic disorders, or if the woman is over age 35 (later pregnancies carrying with them a higher risk of chromosomal abnormality).

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chorionic villus sampling

A Dictionary of Nursing | 2008 | Â© A Dictionary of Nursing 2008, originally published by Oxford University Press 2008. (Hide copyright information) Copyright

chorionic villus sampling (CVS) n. a procedure for the prenatal diagnosis of chromosomal abnormalities (e.g. Down's syndrome) in which a sample of placental tissue (containing chorionic villi) is aspirated through the cervix or abdomen under ultrasound visualization. The cells so obtained are subjected to chromosomal and biochemical analysis. CVS is usually performed between the 10th and 13th weeks of gestation.

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CVS

A Dictionary of Nursing | 2008 | Â© A Dictionary of Nursing 2008, originally published by Oxford University Press 2008. (Hide copyright information) Copyright

CVS n. see chorionic villus sampling.

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"CVS." A Dictionary of Nursing. Oxford University Press. 2008. Encyclopedia.com. 29 Nov. 2009 <http://www.encyclopedia.com>.

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Free newspaper and magazine articles

	Warning about prenatal test. (chorionic villus sampling) Magazine article from: FDA Consumer; 12/1/1992
	New Integrated Screening for Down Syndrome Being Offered at California Pacific Medical Center; Non-Invasive Screening Detects up to 90% of Down Syndrome Cases. Business Wire; 7/30/2003
	Prenatal paternity testing: why, when, how? Magazine article from: Medical Laboratory Observer; 6/1/1997

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Related articles from newspapers, magazines, and more

	Chorionic villi sampling: a wolf in sheep's clothing? Magazine article from: Trial; 2/1/2000; ; 700+ words ; ...procedure, chorionic villi sampling (CVS), has been used...about the safety of chorionic villi sampling. It...performing CVS, a sample of chorionic villi--the tiny...In some instances, chorionic villi sampling may do more...coordinator of the ...
	Chorionic villus sampling significantly affects fetal cardiovascular function Magazine article from: Journal of Maternal - Fetal & Neonatal Medicine; 4/1/2007; ; 700+ words ; ...assess the effects of chorionic villus sampling (CVS) on fetal heart...gestational age. Keywords: Chorionic villus sampling, fetal...heart rate Introduction Chorionic villus sampling (CVS) has...disruption of placental villi it, per force, involves...
	Researchers from Washington University publish findings in chorionic villus sampling. Magazine article from: Women's Health Weekly; 11/20/2008; 700+ words ; ...associated with such losses after chorionic villus sampling (CVS). This is a retrospective...including all women undergoing chorionic villus sampling and a control...Washington University (see also Chorionic Villus Sampling). The researchers...
	Reports summarize chorionic villus sampling research from J.R. Wax and co-authors.(Report) Magazine article from: Women's Health Weekly; 11/19/2009; 583 words ; ...transabdominal and transcervical chorionic villus sampling (CVS). Women with singleton...Wax and colleagues (see also Chorionic Villus Sampling). The researchers...Gynecology (Pain associated with chorionic villus sampling: transabdominal...
	Pain associated with transabdominal chorionic villus sampling-Anticipated versus actual Magazine article from: Journal of Maternal - Fetal & Neonatal Medicine; 7/1/2006; ; 700+ words ; ...with transabdominal chorionic villus sampling (TA...perceived pain. Keywords: Chorionic villus sampling, pain...analgesia Introduction Chorionic villus sampling (CVS...the procedure. The sampling route was selected...transcervical CVS. All samplings ...
	Research in the area of chorionic villus sampling reported from L. Ferrara and colleagues. Magazine article from: Women's Health Weekly; 11/27/2008; 600 words ; ...whether patients undergoing chorionic villus sampling (CVS) prior to MPR are at...Ferrara and colleagues (see also Chorionic Villus Sampling). The researchers...Obstetrics and Gynecology (Chorionic villus sampling and the risk...
	NT of 4 mm or more warrants chorionic villus sampling.(News)(nuchal translucency) Magazine article from: OB GYN News; 3/1/2006; ; 700+ words ; ...warrants immediate consideration of chorionic villus sampling, Dr. Fergal Malone reported...an indication for immediate chorionic villus sampling, and a measurement...for strong consideration of chorionic villus sampling, Dr. Malone...
	Warning about prenatal test. (chorionic villus sampling) Magazine article from: FDA Consumer; 12/1/1992; 700+ words ; ...manufacturer to add a wanting about the risk to the test's patient labeling. FDA is also requiting the test, called chorionic villus sampling (CVS), to carry revised physician instructions specifying that the test should only be done after the lOth...
	Prenatal test linked to limb abnormalities. (chorionic villus sampling) Newspaper article from: HealthFacts; 5/1/1992; 664 words ; ...higher than expected rate of limb abnormalities has been identified among babies born to women who underwent chorionic villus sampling (CVS). This prenatal test has been used for nearly a decade to detect genetic disorders. It has the advantage...
	Setting odds on extremity defects after CVS. (chorionic villus sampling performed on pregnant women increases risk of limb deformities in their babies) Magazine article from: Science News; 7/9/1994; ; 700+ words ; Many pregnant women, especially those over age 35, rely on chorionic villus sampling (CVS) early in pregnancy to tell them if they are carrying a fetus with a genetic abnormality such as Down's syndrome. Doctors...