Rochester, Minn. Gabbe SG, et al. Genetic screening and prenatal genetic diagnosis. In: Obstetrics: Normal and Problem Pregnancies. Philadelphia, Pa. Accessed Aug. Ghidini A. Chorionic villus sampling. Cunningham FG, et al. Prenatal diagnosis. In: Williams Obstetrics. New York, N. Frequently asked questions. Pregnancy FAQ Prenatal genetic diagnostic tests. American College of Obstetrics and Gynecology.
Creasy RK, et al. Prenatal diagnosis of congenital disorders. Content on this website is provided for information purposes only. Information about a therapy, service, product or treatment does not in any way endorse or support such therapy, service, product or treatment and is not intended to replace advice from your doctor or other registered health professional.
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The State of Victoria and the Department of Health shall not bear any liability for reliance by any user on the materials contained on this website. Skip to main content. Medical tests. Home Medical tests. Pregnancy tests — chorionic villus sampling. Actions for this page Listen Print. Summary Read the full fact sheet. On this page.
Women who are offered chorionic villus sampling Medical issues to consider with CVS Chorionic villus sampling procedure Immediately after chorionic villus sampling Complications of CVS Self-care after CVS Long term outlook after chorionic villus sampling Other types of pregnancy tests Where to get help Things to remember. Chorionic villus sampling CVS is a pregnancy test that checks the baby for genetic or biochemical abnormalities. The placenta is made of the same cells as the baby, so the baby can be tested by taking a small sample of the placenta.
The sample is removed using a slender needle inserted through the abdomen. The tissue chorionic villi is then examined in a laboratory. The risk of miscarriage following CVS is one in , so it is important to thoroughly understand the benefits, risks and complications before agreeing to take the test.
The full results, including smaller, rarer conditions, can take 2 to 3 weeks to come back, although if the test is looking for a specific disorder the results may take up to a month. This means the baby will not have any of the disorders that were tested for.
It is occasionally possible to have a normal result but then the baby is born either with the condition that was tested for or with another genetic condition. This is because a normal test result cannot exclude every possible genetic disorder. You will then be able to discuss the implications fully. There is no cure for most chromosomal conditions. Therefore, you need to consider your options carefully.
If you are considering termination, talk to your doctor or midwife. They can give you important information and advice and can refer you to a counsellor if you like.
Learn more here about the development and quality assurance of healthdirect content. InsideRadiology provides free and easily accessible, accurate, up to date and credible information about medical imaging tests and procedures.
Read more on InsideRadiology website. Congenital disorder, also known as congenital disease or birth defects, are conditions present from birth. Find out more about congenital disorders. A nuchal translucency scan is part of the ultrasound scan that may give an indication of chromosomal abnormality. Learn more about how and when it is performed. Down syndrome causes intellectual disability and other challenges. Early intervention can help children with Down syndrome reach their full potential.
Read more on raisingchildren. By week 12, your baby is the size of a plum but fully formed, with their organs, muscles, limbs and bones in place. At week 13 of pregnancy, you officially enter your second trimester and hopefully any morning sickness has eased off. Find out what being Rhesus D negative could mean for your baby and how it is treated. Genetic counselling may be recommended for people who have a history of hereditary disorders.
Find out more about why CVS is offered and deciding whether to have it. CVS is usually carried out between the 11th and 14th weeks of pregnancy, although it's sometimes performed later than this if necessary. The test itself takes about 10 minutes, although the whole consultation may take about 30 minutes. The CVS procedure is usually described as being uncomfortable rather than painful, although you may experience some cramps that are similar to period pains for a few hours afterwards.
Find out more about what happens during CVS. The first results of the test should be available within 3 working days and this will tell you if Down's syndrome, Edwards' syndrome or Patau's syndrome has been discovered. If rarer conditions are also being tested for, it can take 2 to 3 weeks or more for the results to come back. A specialist doctor obstetrician or midwife will explain what the screening results mean and talk to you about your options. There's no cure for most of the conditions found by CVS, so you'll need to consider your options carefully.
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