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  • Perinatal Center
  • Prenatal Testing

Prenatal Testing

Cabell Huntington Hospital offers testing to monitor high-risk fetuses in order to better prepare and inform patients before delivery.

Nuchal Translucency Screening

The first trimester nuchal translucency screening determines the woman's risk for her baby to have chromosomal abnormalities. The most common of these include Down Syndrome (Trisomy 21), Trisomy 18, Trisomy 13 and sex chromosome abnormalities such as Turner Syndrome or Kleinfelter Syndrome. Some of these abnormalities cause birth defects and intellectional disabilities. This test can be performed between 11 and 13 weeks into the pregnancy. The ultrasound measures the amount of fluid accumulated within the skin behind the fetus' neck.

Ultrasound

Ultrasound can pick up genetic markers for Down Syndrome and other chromosomal problems in the second trimester. The markers that sonographers look for include major structural defects of the heart, brain and spine, shortened long bones, kidney abnormalities, among others. Further testing can be done by amniocentesis.

Amniocentesis

Amniocentesis is a 15- to 30-minute procedure in which a needle is inserted into the uterus to take a sample of the fluid surrounding the fetus. It is an elective procedure that may be chosen by women with certain risk factors. The patient is numbed, and the physician uses ultrasound as a guide for inserting the needle through the abdomen. The equivalent of about two tablespoons of fluid around the baby is removed and sent for chromosomal and biochemical analysis. With amniocentesis comes the risk that one woman in every 200 may have a miscarriage because of the procedure.

Non-Stress Test

The Fetal Non-Stress Test is performed by placing an elastic strap around the pregnant woman's abdomen and securing a monitor called an ultrasound transducer so that the baby's heart rate can be monitored. The mother pushes a button each time she feels the baby move during the evaluation period. The purpose of this test, which takes approximately 20 to 40 minutes, is to assess how the baby's heart rate responds when it moves.

Other Tests

Other evaluation measures to follow high-risk fetuses include weekly biophysical profiles by ultrasound, non-stress fetal heart rate monitoring and Doppler studies. Biophysical profiles are performed to observe fetal behavior such as fetal movement, tone, breathing and amniotic fluid volume. Umbilical artery Doppler ultrasound is used to follow intrauterine fetal growth, and the middle cerebral artery Doppler flow is measured to monitor fetal anemia due to Rh incompatibility. Fetal blood transfusions can also be performed to help the fetus with Rh blood incompatibilities, which can lead to fetal anemia.

While the tests raise very serious questions for patients, a well-informed patient can then make intelligent decisions about her pregnancy. The center also provides genetic counseling for patients who receive news that they are of increased or high risk for having a child with a serious or ultimately fatal condition.

In some cases, the question is not whether to continue the pregnancy, but it may involve delivering the baby early or even performing minimal fetal treatment in utero to buy time until the fetus is capable of independent existence outside the womb and more definitive treatment can then be done by a pediatric surgeon.

Birth defects occur in one out of every 28 pregnancies, according to the March of Dimes. The decision to have prenatal screening is a personal one that should be made between the mother and her physician. If you are pregnant and interested in the newer, less invasive tests that are now available, call the Perinatal Center for more information at 304.526.2124.

  Back to Perinatal Center
  • Prenatal Testing
  • What Causes a High-Risk Pregnancy?
  • 4D Ultrasound - Picture Your Baby's Face
  • Maternal Hypertension Care
  • Perinatal Bereavement Support Group
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Cabell Huntington Hospital
1340 Hal Greer Blvd
Huntington, WV 25701
304.526.2000

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