Chorionic villus sampling (CVS), a test for pregnant women that checks chorionic villi The placenta identifies tiny fingers that look like fingers. The placenta is the organ that feeds the fetus. The analysis searches for abnormalities in the baby’s chromosomes. Chromosomes are considered parts of cells that contain genes. Genes are pieces of DNA that are passed on from the mother and founder. People usually have a total of 46 chromosomes.
Chorionic villi It contains the same chromosomes as the fetus. Therefore, CVS analysis can show whether a baby has additional chromosomes or if it is missing or broken. These chromosome differences can cause serious health problems.
CFS is considered a prenatal diagnostic test. That is, it can almost always tell if a fetus has a chromosomal abnormality. This is different from a prenatal screening test, which indicates whether the baby is at high risk for serious health problems.
Other name: CFS Test
What is it used for?
CVS tests are used to determine chromosomal problems or other genetic diseases in the fetus. These include:
- Down syndrome, mental disorders, certain physiological characteristics, and conditions that cause all kinds of health problems.
- Taaise Fire is a disease that causes mucus buildup in mucous membranes and other organs, making it difficult to actually breathe.
- Sickle cell disease, a red blood cell condition. Can cause pain, infection, and damage to organs and strokes.
- Tay-Sachs disease, a condition in which fatty proteins accumulate in the brain. Vision, hearing, and intellectual development are affected; most children with Tay-Sachs die at age 5.
The CVS test is fairly accurate and can be done during pregnancy, between weeks 10 and 13. However, it can only diagnose certain genetic disorders; the CFS analysis does not diagnose or screen for birth defects, such as neural tube defects, conditions that cause abnormal formation of the developing brain and/or spine. Any type of test, including alpha-fetoprotein (AFP) blood tests, can be used to screen or diagnose these and other birth defects.
Why is the CFS test needed?
A CFS test may be necessary if the baby is at high risk for chromosomal abnormalities. The risk points are as follows
- Year. women over 35 years of age have an increased risk of ingesting a baby with Down syndrome or another genetic disorder.
- Family history of the genetic disorder.
- Having another baby with a genetic disorder
CFS testing may be required if the prenatal screening test yields abnormal results.
What happens during a CFS test?
There are two CFS tests that look similar.
- Transabdominal The sample Through the belly.
- Transcervical. The sample Through the neck of the uterus. The neck is a lower, limited cover of the uterus that emerges into the vagina.
The physician uses ultrasound to find the baby and guide function (abdominal or transvaginal). Ultrasound is image analysis that uses sound waves to create an image.
During the abdominal summary, your doctor will
- Clean the abdomen with antiseptic.
- Apply a difficult drink to the abdomen.
- Insert a long delicate needle through the abdomen and uterus into the placenta. As the needle penetrates the uterus, you may feel a cramping or pushing sensation.
- Use the needle on a sample Tissue of the placenta.
- Remove the needle.
During transvesinal CFS, your health care provider will
- Clean the vagina and neck of the uterus with antiseptic
- Use an instrument called a Speculum to carefully iron along the sides of the vagina.
- Insert a fragile tube into the vagina and neck of the uterus and into the placenta. When this occurs, small attacks or cramps can be felt.
- Use caution with the tube! a sample Tissue of the placenta.
- Remove the tube.
Need to prepare for the test?
On the morning of the test you will be asked to drink extra water instead of urinating. This helps the bladder to fill and the uterus to be in one of the best conditions for the procedure.
Was there any danger in the test?
While CFS is generally a harmless procedure, there are some hazards. These include
- Miscarriage, what happens during one of the hundreds of procedures
- Infection
- Hemorrhage
- RV sensitization. This is a condition in which your body produces antibodies (proteins produced by the immune system) that attack the baby’s red blood cells. If the diagnosis is made during pregnancy, the cure is simple.
- Defects in the baby’s limbs (this is very rare)
What do the results mean?
CVS results are usually available after 2 months.
If the results are not normal, it may mean that your baby has a chromosomal or genetic disorder such as Down’s or Taaais’ Approval Syndrome. the results of the CFS test may be unknown and your midwife may recommend an amniotic fluid. Amniotic fluid is considered a different prenatal diagnostic test. It is performed between the 15th and 20th week of pregnancy.
If you have questions about the results, consult your health care provider.
What else should I know about the CVS Trial?
Some chromosomal and genetic conditions are strong indications that your baby needs careful treatment. Other conditions may not be curable; if the CVS test results are not normal, talk to your doctor about the necessary options and conclusions. It is also advisable to consult a genetic counselor before and after getting the results. A genetic counselor is a trained genetic specialist who can help you understand what the results mean.
Courtesy of MedlinePlus from the National Library of Medicine.
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