A technique for prenatal detection of genetic defects that involves removal of some of the villi growing on the outer surface of the chorion and examining their chromosomes.
An antenatal screening test carried out by examining cells from the chorionic villi of the outer membrane surrounding an embryo, which have the same DNA as the fetus.
A diagnostic method sometimes done 8-10 weeks after the start of pregnancy to discover fetal abnormalities. A catheter (small tube) is inserted through the vagina, cervix, and uterus. Using ultrasound guidance, a small sample of villi (small projections of the sac that surrounds the fetus) is then removed and examined.
A prenatal test that detects genetic abnormalities in a fetus. In chorionic villus sampling (CVS), a small sample of chorionic villi (projections in the placenta that absorb nutrients from the mother’s blood) is taken from the placenta. Guided by ultrasound, the doctor inserts either a catheter through the cervix or a needle through the mother’s abdominal wall, removing a sample of cells from the villi. The sample is sent to a laboratory, where the cells will be grown and studied for genetic abnormalities. The test can identify conditions, such as Down syndrome and Tay-Sachs disease, some inherited conditions, and sex.
A diagnostic technique under investigation for early detection of certain genetic abnormalities in the fetus. A thin tube is inserted into the uterus as early as the ninth week of pregnancy (following ultrasound examination), and a few cells from the chorion (the tissue which develops into the placenta) are removed and examined immediately under the microscope. The procedure may be useful at least six weeks earlier than amniocentesis, which must be done later, and which requires several weeks of laboratory work.
A procedure for obtaining a sample of the chorionic villi. In one method, a catheter is inserted into the cervix and the outer portion of the membranes surrounding the fetus. Microscopic and chemical examination of the sample is useful in prenatal evaluation of the chromosomal, enzymatic, and DNA status of the fetus. CVS may be performed between gestational weeks 8 and 12 in women who are at high-risk for serious fetal chromosomal abnormalities.
A procedure in which a small piece of the developing placenta is removed and examined for signs of inherited disorders in the fetus.
A prenatal diagnostic procedure conducted typically during the 10-12 weeks of gestation is known as chorionic villus sampling (CVS). With the aid of ultrasound guidance, a needle is carefully inserted either through the mother’s vaginal or abdominal wall to obtain a sample of cells from the vicinity of the developing embryo. These cells are subsequently subjected to testing to identify any potential chromosome abnormalities or genetic diseases.
Chorionic villus sampling is a diagnostic technique used to detect genetic abnormalities in a developing fetus. This procedure involves extracting a small tissue sample from the chorionic villi, which are located at the periphery of the placenta. The collected cells possess the same chromosomal composition as the fetal cells and can be utilized for laboratory analysis to identify any genetic abnormalities. Subsequently, the villi cells are transported to a specialized laboratory for chromosome analysis.
Chorionic villus sampling (CVS) is offered to women who have a higher-than-normal risk of giving birth to a child with a genetic disease like thalassemia or a chromosomal abnormality such as Down’s syndrome. This procedure is typically conducted around the 10th week of pregnancy and can be performed either through the abdomen or vaginally, depending on the placement of the placenta. It is important to note that CVS slightly increases the risk of miscarriage.