“Amniocentesis is a medical procedure used in prenatal diagnosis of chromosomal abnormalities, foetal infections and sex determination.” What is Amniocentesis?Amniocentesis is a diagnostic procedure undergone during pregnancy. It is most commonly used to check the baby’s chromosomes. Amniocentesis is performed occasionally to examine diseases during pregnancy such as infections or genetic disorder. This procedure is done by taking out the amniotic fluid. We do not usually need a local anaesthetic. The foetus is surrounded by the amniotic fluid that contains foetal cells and other substances such as alpha foetoprotein. It also protects the foetus from any mechanical injury and helps in regulating the temperature of the foetus. The cells and substances present in the amniotic fluid provide important information about the baby’s health before birth. Why is Amniocentesis performed?The amniocentesis is performed to check:
Also Read: Overview of Chromosomal Abnormalities Procedure of AmniocentesisAmniocentesis follows the following procedure:
Risks Involved In AmniocentesisThe risks involved in amniocentesis include:
Risk of InjuriesInjuries to the baby by the needle are exceedingly rare now since the procedure is done under ultrasound guidance. Risk of MiscarriagesRisks of miscarriages still exist but have also come down significantly. Miscarriages might result from bleeding from the baby if one of the vessels of the baby is cut by the needle (this is very rare) or might result from an infectious disease, rupture of the membranes, or spontaneous labour. This is the reason why we clean the skin very carefully before inserting the needle. Occasionally a baby might also die after a normal amniocentesis due to unexplained reasons. Also Read: Medical Termination of Pregnancy Care after the AmniocentesisComplications of the amniocentesis are rare, but in order to be on the safe side, one can follow the following precautions.
By the next day, one can get back to their normal schedule. In case of any unusual cramps, bleeding, leakage of fluid, chills or fever, let the doctor be informed about the same. Ban on AmniocentesisAmniocentesis had been banned in India in 1994, under the Preconception and Prenatal Diagnostic Techniques Act. This was because amniocentesis could reveal the sex of the foetus. Since a girl child is not accepted in many parts of the country, the female foetus is aborted in most of the cases. To stop this, amniocentesis was banned in India. Also Read: Reproductive Health To learn more about what is amniocentesis, its definition, procedure and the risks involved, keep visiting BYJU’S website or download BYJU’S app for further reference.
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0 arewrong out of 0 are correct out of0 are Unattempted View Quiz Answers and Analysis out ofReviewed by Jennifer Robinson, MD on October 22, 2021 During pregnancy, the fetus is surrounded by amniotic fluid, a substance much like water. Amniotic fluid contains live fetal cells and other things, such as alpha-fetoprotein (AFP). They provide important information about your baby's health before birth. Your doctor may suggest a test called amniocentesis (or amnio) if your baby is at a higher risk of some birth defects. You may also need it if you have signs of an infection or if you may deliver early. Unlike blood testing, which shows only whether you are at risk, amniocentesis is used to make a diagnosis. Amniocentesis is an invasive prenatal test in which your doctor takes a sample of the amniotic fluid. The sample (less than an ounce) is removed through a fine needle inserted into the uterus through your abdomen, under ultrasound guidance. A lab tests the sample, checking your baby’s chromosomes. Those tests can include the karyotype test, the FISH test, and microarray analysis. A complete anatomical ultrasound will be done prior to amniocentesis. but amniocentesis is most commonly performed to look for certain types of birth defects, such as Down syndrome, a chromosomal abnormality. Because amniocentesis presents a small risk for both the mother and their baby, the prenatal test is generally offered to women who have a significant risk for genetic diseases, including those who:
Amniocentesis does not detect all birth defects, but it can be used to detect the following conditions if the parents have a significant genetic risk: Amniocentesis can detect certain neural tube defects (diseases where the brain and spinal column don't develop properly), such as spina bifida and anencephaly. Because ultrasound is performed at the time of amniocentesis, it may detect birth defects that are not detected by amniocentesis (such as cleft palate, cleft lip, club foot, or heart defects). There are some birth defects, however, that will not be detected by either amniocentesis or ultrasound. If you are having an amniocentesis, you may ask to find out the baby's sex; amniocentesis is the most accurate way. Although it's rarely performed in the third trimester, an amniocentesis can determine if the baby's lungs are mature enough for delivery, or to evaluate the amniotic fluid for infection. If your doctor has recommended an amniocentesis, the procedure is usually scheduled once between the 15th and 18th weeks of pregnancy. The accuracy of amniocentesis is about 99.4%. Amniocentesis may occasionally be unsuccessful due to technical problems, such as being unable to collect an adequate amount of amniotic fluid or failure of the collected cells to grow when cultured. Yes. There is a small risk that an amniocentesis could cause a miscarriage (less than 1%, or approximately 1 in 1,000 to 1 in 43,000). Injury to the baby or mother, infection, and preterm labor are other potential complications that can happen but are extremely rare. The risks are higher in women carrying twins. Yes. You will receive genetic counseling before the procedure. After the risks and benefits of amniocentesis have been thoroughly explained to you, you can choose whether or not you want to have the procedure. A small area of the abdomen is cleansed with an antiseptic to prepare for the amniocentesis. You may receive a local anesthetic (pain-relieving medication) to reduce any discomfort. The doctor first locates the position of the fetus and placenta with an ultrasound. Under ultrasound guidance, the doctor inserts a thin, hollow needle through your abdomen and uterus, and into the amniotic sac, away from the baby. A small amount of fluid (less than an ounce) is removed through the needle and sent for laboratory analysis. If you’re carrying twins and each baby has their own amniotic sac, your doctor will take two samples. Amniocentesis is a little trickier with twins than it is with single babies. Make sure your doctor or technician has experience doing amniocentesis with multiples. You may feel minor menstrual-like cramping or discomfort during the amniocentesis or for a few hours after the procedure. After an amniocentesis, it is best to go home and relax for the remainder of the day. You should not exercise or perform any strenuous activity, lift anything over 20 pounds (including children), or have sex. You may take two Tylenol (acetaminophen) every 4 hours to relieve discomfort. The day after the procedure, you may resume all of your normal activities unless otherwise directed by your doctor. Call your doctor if you develop a fever or have bleeding, vaginal discharge, or abdominal pain that is more severe than cramps. The results of the amniocentesis are generally available within 2 or 3 weeks. If you have not received the results within 3 weeks, call your health care provider. If the test shows a problem, you'll meet with a counselor to talk about your options. Doctors can sometimes treat certain birth defects, such as spina bifida, while your baby is still in the womb. Knowing about an issue can also help by increasing monitoring during pregnancy and helping you and your doctor to prepare. |