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Topic: Chorionic villus sampling


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  * Chorionic Villus Sampling - (Pregnancy & Parenting): Definition   (Site not responding. Last check: 2007-09-18)
Chorionic Villus Sampling (CVS) is performed between the 9th and 11th week of pregnancy, It is a test for chromosomal abnormalities.
Chorionic Villus Sampling (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...
Chorionic villus sampling: a prenatal test in which a soft, thin tube is inserted through the cervix, or a needle through the abdomen, to the chorionic villi,...
www.bestknows.com /pregnancy/chorionic_villus_sampling.html   (1137 words)

  
 chorionic villus sampling on Encyclopedia.com   (Site not responding. Last check: 2007-09-18)
(kōrand180;ē-ŏn´Ĭk, kôrand180;-) (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.
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.
www.encyclopedia.com /html/c1/chorion.asp   (379 words)

  
 Gale Encyclopedia of Medicine: Chorionic villus sampling
Chorionic villus sampling is performed on pregnant women who are at risk for carrying a fetus with a genetic or chromosomal defect.
Chorionic villus sampling is not recommended for women who have vaginal bleeding or spotting during the pregnancy.
Chorionic villi are microscopic, finger-like projections that emerge from the chorionic membrane and eventually form the placenta.
www.findarticles.com /p/articles/mi_g2601/is_0003/ai_2601000316   (1152 words)

  
 Chorionic villus sampling
The chorion is the portion of fetal membrane that eventually forms the fetal side of the placenta.
The chorionic villi are of fetal origin so examining the samples of them can give the genetic makeup of the fetus.
The sample is used to study the DNA, chromosomes, and enzymes of the fetus; and can be done before amniocentesis, about 10 to 12 weeks after a missed period.
www.stv.org /adam/encyclopedia/imagepages/9181.htm   (174 words)

  
 Chorionic villus sampling   (Site not responding. Last check: 2007-09-18)
Chorionic villus sampling (CVS) is an alternative to amniocentesis for prenatal diagnosis.
CVS involves removing a small sample of the placenta with a thin needle which is inserted through a woman's abdomen or with a catheter which is inserted through the vagina and cervix.
The CVS sample is sent to the laboratory where it can be examined either immediately, or after the cells are cultured and allowed to grow and divide.
www.medgen.ubc.ca /wrobinson/mosaic/cvs.htm   (963 words)

  
 Chorionic Villus Sampling (CVS)
Chorionic villus sampling (CVS) is a test done during early pregnancy that can identify certain problems with your baby (fetus).
During CVS, a sample of the chorionic villus cells is taken for biopsy.
Chorionic villus sampling is most commonly performed by a perinatologist in the doctor's office or the hospital.
www.webmd.com /hw/being_pregnant/hw4104.asp   (1799 words)

  
 Chorionic Villus Sampling and Amniocentesis: Recommendations for Prenatal Counseling
Chorionic villus sampling (CVS) and amniocentesis are prenatal diagnostic procedures that are performed to detect fetal abnormalities.
Chorionic villus sampling (CVS) and amniocentesis are prenatal diagnostic procedures used to detect certain fetal genetic abnormalities.
Chorionic villus sampling and transverse limb deficiencies: maternal age is not a confounder.
www.cdc.gov /mmwr/preview/mmwrhtml/00038393.htm   (4913 words)

  
 American Family Physician: Chorionic villus sampling.@ HighBeam Research   (Site not responding. Last check: 2007-09-18)
Chorionic villus sampling offers potential advantages over traditional amniocentesis for the prenatal diagnosis of genetic abnormalities.
While amniocentesis is most commonly performed at 16 weeks' gestation and requires that cells be cultured before testing, chorionic villus sampling can be performed in the first trimester and provides ready-to-test genetic tissue directly from the placenta.
However, chorionic villus sampling is more labor-intensive and appears to have a higher complication rate than amniocentesis.
www.highbeam.com /library/doc0.asp?DOCID=1G1:8266969&refid=ip_encyclopedia_hf   (184 words)

  
 Chorionic Villus Sampling (CVS) and Amniocentesis at GIVF   (Site not responding. Last check: 2007-09-18)
Chorionic Villus Sampling (CVS) and Amniocentesis at GIVF
This summary is not a substitute for the additional literature supplied before amniocentesis or chorionic villus sampling at Genetics and IVF Institute, nor is it a substitute for actual genetic counseling.
Chorionic villus sampling is offered at Genetics and IVF Institute from about the 10th through the 13th week of pregnancy, also dated from the last menstrual period.
www.givf.com /cvs_amniov.cfm   (824 words)

  
 Pregnancy: Chorionic Villus Sampling (CVS) Information on Medicinenet.com
Chorionic villus sampling (CVS) is a prenatal test that is used to detect birth defects, genetic diseases, and other problems.
During the test, a small sample of cells (called chorionic villi) is taken from the placenta where it attaches to the wall of the uterus.
Chorionic villi are tiny parts of the placenta that are formed from the fertilized egg, so they have the same genes as the baby.
www.medicinenet.com /chorionic_villus_sampling/article.htm   (375 words)

  
 Dynagene's Chromosome Analysis Chorionic Villus Sampling   (Site not responding. Last check: 2007-09-18)
Chorionic villus sampling (CVS) involves a biopsy of the primitive placenta or chorion at 10-12 weeks gestation.
Fragments of the chorion are aspirated under ultrasound guidance and used for the analysis.
As the placenta and embryo are both derived from the blastocyst, the placenta is representative of fetal tissue.
www.dynagene.com /education/cvs.html   (459 words)

  
 Chorionic villus sampling   (Site not responding. Last check: 2007-09-18)
Chorionic villi are microscopic projections that line the chorion, the outermost layer of the embryonic sac.
To take a chorionic villus sample, your surgeon either enters the uterus through the cervix (transcervical procedure) or through the abdomen (transabdominal procedure).
Once the catheter or needle reaches the chorionic villi, your surgeon withdraws a small sample and carefully removes it from the uterus.
www.shands.org /health/surgeries/100194.html   (871 words)

  
 CVS
A small sample of the chorionic villi is removed from the placenta.
The chorionic villi sample is obtained by passing a fine needle through the abdominal wall and into the placenta using ultrasound for guidance.
Samples of the tissue are examined immediately (under a microscope) to make certain enough tissue is collected.
www.wcox.com.au /cvs.htm   (1229 words)

  
 Chorionic villus sampling
Prior to the chorionic villus sampling procedure the woman needs to drink fluids and refrain from urinating to ensure her bladder is full.
It is generally recommended that women undergoing chorionic villus sampling have someone drive them home and have no plans for the rest of the day.
Chorionic villi are of fetal origin and eventually form the placenta.
www.healthatoz.com /healthatoz/Atoz/ency/chorionic_villus_sampling.jsp   (1691 words)

  
 Chorionic Villus Sampling   (Site not responding. Last check: 2007-09-18)
Chorionic villus sampling, or CVS, is a procedure in which a small sample of tissue is removed from the placenta.
A small amount of this tissue is removed and the cells derived from the chorion are used for genetic testing.
The Safety and efficacy of Chorionic Villus Sampling for Early Prenatal Diagnosis of Cytogenetic Abnormalities.
www.chw.org /display/PPF/DocID/5773/router.asp   (1565 words)

  
 Chorionic Villus Sampling (CVS)
Chorionic villus sampling (CVS) is a procedure in which a small sample of tissue is removed from the placenta early in a pregnancy.
When the tube is in the right place, the doctor withdraws a small sample of chorionic villus tissue.
Ultrasound is used to locate the chorionic villus and the baby.
folsomobgyn.com /chorionic_villus_sampling_(cvs).htm   (807 words)

  
 Chorionic Villus Sampling (CVS) - OhioHealth   (Site not responding. Last check: 2007-09-18)
Chorionic villus sampling (CVS) is a prenatal diagnostic test that can diagnose or rule out chromosome abnormalities such as Down syndrome and certain genetic disorders such as cystic fibrosis in the baby.
The sample of chorionic villi tissue can be obtained by inserting a needle through mother’s abdomen into the placenta or by inserting a thin, hollow tube, called a catheter, through mother’s cervix into the placenta.
The advantage of chorionic villi sampling is that diagnosis can be made during the first trimester of pregnancy.
www.ohiohealth.com /services/womenshealth/maternity/resourcecenter/pregnancy/prenataltesting/cvs.htm   (291 words)

  
 TBDHU - Chorionic Villus Sampling Factsheet   (Site not responding. Last check: 2007-09-18)
Chorionic villus sampling is a test done to obtain a few cells from the developing placenta (the chorion).
The sample is obtained either by passing a small catheter through the vagina and cervix into the uterus, or by inserting a fine needle through the abdominal wall into this area.
Chorion has a maternal component and cells from the mother may contaminate the sample.
www.tbdhu.com /factsheets/ChorionicVillusSampling.htm   (687 words)

  
 Chorionic Villus Sampling (CVS) : American Pregnancy Association
Chorionic villus sampling, often referred to as CVS, is a diagnostic test for identifying chromosome abnormalities and other inherited disorders.
CVS is a diagnostic procedure which involves removing some chorionic villi cells from the placenta at the point where it attaches to the uterine wall.
DNA is collected from the potential father and is compared to DNA obtained from the baby during chorionic villus sampling.
www.americanpregnancy.org /prenataltesting/cvs.html   (702 words)

  
 Chorionic Villus Sampling (CVS) -- Women's Health Advisor   (Site not responding. Last check: 2007-09-18)
Chorionic villus sampling (CVS) is a test that may be done early in pregnancy.
Amniocentesis is a procedure in which fluid is sampled from the sac surrounding the baby.
A small sample of chorionic villus tissue is withdrawn.
www.medformation.com /ac/crswa.nsf/wha/wha_cvs_crs.htm   (867 words)

  
 CYTOGENETIC EVALUATION OF 1000 CASES OF CHORIONIC VILLUS SAMPLING
Chorionic villus sampling (CVS) for first trimester fetal karyotyping is now a routine diagnostic procedure in at-risk pregnancies.
As soon as the sample was received in the laboratory, the villi were separated meticulously from the maternal decidua under a stereo-microscope.
Chorionic villus sampling was performed either transcervically or transabdominally in 1000 patients by two operators.
www.kfshrc.edu.sa /annals/186/96-388.html   (2965 words)

  
 chorionic villus sampling   (Site not responding. Last check: 2007-09-18)
During chorionic villus sampling (CVS), a small sample is taken from the lacy fibrils surrounding the sac that holds the fetus and amniotic fluid.
A sample of the fibrils on the outside of the sac is suctioned out.
Then, a needle is put through the wall of uterus and a sample of the fibrils is drawn up into the needle.
www.northmemorial.com /HealthEncyclopedia/content/1130.asp   (589 words)

  
 Frankford Hospitals - Chorionic Villus Sampling (CVS)
Chorionic villus sampling (CVS) is a prenatal test that involves taking a sample of tissue from the placenta, a structure in the uterus that provides blood and nutrients from the mother to the fetus, to test for chromosomal abnormalities and certain other genetic problems.
The chorionic villi are tiny projections of placental tissue that look like fingers and contain the same genetic material as the fetus.
Chorionic villus sampling may be used for genetic and chromosome testing in the first trimester of pregnancy in the presence of one or more of the following conditions:
www.frankfordhospitals.org /healthinfo/t_and_p/gyn/TP108.html   (1654 words)

  
 Chorionic villus sampling (CVS), Eastern Carolina
Chorionic villus sampling (CVS) is a test done during pregnancy to detect some chromosome abnormalities and inherited diseases.
Chorionic villi are the tiny fingerlike projections found in the placenta.
The genetic material of the chorionic villus sample is identical to that found in the fetus, so the sample can be analyzed to detect certain genetic diseases.
www.uhseast.com /122249.cfm   (232 words)

  
 Chorionic Villus Sampling (CVS)
Chorionic villus sampling, or CVS, is a procedure in which a small piece of tissue is taken from the chorionic villi early in pregnancy.
The chorionic villi are lacy fibrils that attach the sac holding the fetus to the uterine wall.
An amniocentesis is a similar procedure that involves taking a sample of the fluid in the sac surrounding the fetus.
www.3-rx.com /chorionic-villus-sampling/default.php   (519 words)

  
 Chorionic Villus Sampling
Chorionic Villus Sampling is an alternative to amniocentesis.
A catheter is inserted through the cervix and a small amount of chorionic villi tissue is sucked into the catheter by a syringe at the other end.
Thre is now an organization called The Chorionic Villus Sampling Birth Defects Registry, hosted by Harvard University, and this group of people is collecting information from those who have had children born with birth defects who were exposed to this sampling procedure.
www.unhinderedliving.com /chorionic.html   (519 words)

  
 Chorionic villus sampling (CVS)
The goal of the procedure is to obtain a tiny tissue sample of your placenta, which will be sent to a lab for analysis.
Depending on where your placenta is attached to your uterus, the doctor performs either a transcervical or a transabdominal CVS, withdrawing the sample of chorionic villi cells through either your cervix or your abdomen.
She does this with a catheter (a thin tube) or a needle, assisted by a technician who uses a vaginal or abdominal ultrasound to determine the position of the placenta and better guide the needle or catheter during the procedure.
www.babycenter.com /refcap/pregnancy/prenatalhealth/328.html   (2058 words)

  
 Chorionic Villus Sampling   (Site not responding. Last check: 2007-09-18)
Chorionic villus sampling (CVS) is a prenatal test that involves taking a sample of some of the placental tissue.
The tissue samples are sent to a genetic laboratory to grow and be analyzed.
Other times, the physician obtains a sample that does not have enough tissue to grow in the laboratory, such that results are incomplete or inconclusive.
www.chw.org /display/router.asp?DocID=3189   (536 words)

  
 Chorionic Villus Sampling - Patient UK
Chorionic Villus Sampling - Patient UK PatientPlus articles are written for doctors and so the language can be technical.
The benefits of earlier diagnosis with chorionic villus sampling must be set against the greater risk of pregnancy loss compared with those from second trimester amniocentesis.
Stranc LC, Evans JA, Hamerton JL; Chorionic villus sampling and amniocentesis for prenatal diagnosis.;Lancet 1997 Mar 8; 349(9053):711-4..
www.patient.co.uk /showdoc/40000223   (477 words)

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