Prenatal Test: Amniocentesisenparents test takes a sample of the amniotic fluid. In the second trimester, it can show signs of chromosomal disorders, genetic problems, and neural tube defects. In the third trimester, it can check for infection and Rh incompatibility, and reveal if a baby's lungs are strong enough to breathe normally after birth.amniocentesis, amnio, chromosomal disorders, genetic problems, neural tube defects, amniotic fluid, prenatal tests, screen, screening, exam, pelvic, uterus, vagina, cervix, cervical test, pap smear, fetus, embryo, baby, urine tests, blood test, ultrasound, prenatal tests, prenatal, second trimester, pregnancy tests, heart defect, neural tube defect, spina bifida, genetic disorder, defect, diabetes, preeclampsia02/05/201808/08/201809/02/2019Armando Fuentes, MD08/02/20185fd3532f-16f6-461d-9b3d-4f27d064ea9b<h3>What Is Amniocentesis?</h3> <p>In amniocentesis, doctors take a sample of the amniotic fluid that surrounds a baby to check for signs of problems such as chromosomal disorders, genetic problems, and neural tube defects.</p> <h3>Why Is Amniocentesis Done?</h3> <p>Examining a sample of the amniotic fluid lets doctors test things in the fluid, such as cells shed by the fetus that contain genetic information. <a href="">Second-trimester</a> amniocentesis is most often used to identify:</p> <ul> <li><a href="">Down syndrome</a> and other chromosome abnormalities</li> <li>structural defects such as <a href="">spina bifida</a></li> <li>inherited metabolic disorders like PKU (phenylketonuria)</li> </ul> <p>Doctors might use this test later in the pregnancy (in the <a href="">third trimester</a>) to check for infection and <a href="">Rh incompatibility</a>. This test can also reveal if a baby's lungs are strong enough to allow the baby to breathe normally after birth. This can help doctors make decisions about inducing labor or trying to <a href="">prevent labor</a>, depending on the situation. For instance, if a mother's water breaks early, the health care provider might try to delay delivering the baby to allow the lungs to mature.</p> <h3>Should I Have Amniocentesis?</h3> <p>Your health care provider may recommend this test if you:</p> <ul> <li>had an abnormal screening test for genetic or chromosomal disorders or neural tube defects</li> <li>are older than age 35</li> <li>have a family history of genetic disorders (or a partner who does)</li> <li>have had a previous child with a birth defect or had a previous pregnancy with a chromosomal abnormality or neural tube defect</li> </ul> <p>Amniocentesis can be very accurate &mdash; close to 100% &mdash; but only some disorders can be detected. The rate of <a href="">miscarriage</a> with this test is between 1 in 300 and 1 in 500. It also carries a low risk of uterine infection, which can also cause miscarriage, leakage of amniotic fluid, and injury to the fetus.</p> <p>Talk to your doctor to find out why this test is recommended for you, and to weigh the pros and cons of having it.</p> <h3>What Happens During Amniocentesis?</h3> <p>While watching with an <a href="">ultrasound</a>, the doctor inserts a needle through the abdominal wall into the uterus to remove some (about 1 ounce) of the amniotic fluid. Some women report cramping when the needle enters the uterus or pressure while the doctor takes the sample.</p> <p>The doctor may check the fetus' heartbeat after the procedure to make sure it's normal. Most doctors recommend rest for several hours after the test.</p> <p>The cells in the fluid sample are grown in a special culture and then analyzed (the specific tests done on the fluid depend on personal and family medical history).</p> <h3>When Is Amniocentesis Done?</h3> <p>Amniocentesis is usually done between 15 and 20 weeks, but can be done later in pregnancy if needed.</p> <h3>When Are the Results Available?</h3> <p>Timing varies depending on what is being tested for, but results usually are available within 1 to 2 weeks. Tests of lung maturity are often available within a few hours.</p>Examen prenatal: AmniocentesisEn la amniocentesis, el médico extrae una muestra del líquido amniótico que rodea al bebé para verificar signos de problemas como trastornos cromosómicos, problemas genéticos y defectos del tubo neural.
Medical Care During PregnancyThe sooner in pregnancy good care begins, the better for the health of both moms and their babies. Here's what to expect.
Prenatal Genetic CounselingGenetic counselors work with people who are either planning to have a baby or are pregnant to determine whether they carry the genes for certain inherited disorders. Find out more.
Prenatal Test: Glucose ScreeningGlucose screenings check for gestational diabetes, a short-term form of diabetes that some women develop during pregnancy.
Prenatal Test: UltrasoundA prenatal ultrasound is a safe and painless test that shows a baby's shape and position. It can be done in the first, second, or third trimester of pregnancy.
Prenatal Tests: FAQsEvery parent-to-be hopes for a healthy baby, but it can be hard not to worry. Find out what tests can keep you informed of your health — and your baby's — throughout pregnancy.
Prenatal Tests: First TrimesterFind out what tests may be offered to you during the first trimester of pregnancy.
Prenatal Tests: Second TrimesterFind out what tests may be offered to you during weeks 13 through 26 of pregnancy.
Prenatal Tests: Third TrimesterFind out what tests may be offered to you during weeks 27 through 40 of pregnancy.
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