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Prenatal Testing

Prenatal testing is a term that describes many tests that are done during pregnancy. The tests provide information about your health and the health of your developing baby. Prenatal testing includes blood and urine tests and ultrasounds. In some cases, more invasive procedures may be recommended. Invasive tests may include sampling placental tissue, drawing fluid from the amniotic sac, or drawing fetal blood from the umbilical cord.

Prenatal tests can be used to identify many different things, including:

  • Treatable health problems in the mother that can affect the health of the fetus
  • Characteristics of the fetus, including size, age, placement in the uterus, and sex
  • Genetic, or chromosomal problems

In the mother, prenatal tests are used to identify things that could possibly affect the developing fetus, including:

Prenatal tests can screen for many different congenital defects in the fetus, including:

Some birth defects can be diagnosed through prenatal testing. Some of these can be treated in utero (before birth) or immediately after birth, but the majority cannot. Prenatal testing can be quite complicated. However, prenatal tests do not test for everything, and no prenatal test guarantees the birth of a healthy baby.

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References:

American Congress of Obstetricians and Gynecologists. Practice bulletin: invasive prenatal testing for aneuploidy. ACOG. December 2007; No. 88.
American Congress of Obstetricians and Gynecologists. Practice bulletin: screening for fetal chromosomal abnormalities. ACOG. January 2007; No. 77.
Bubb JA, Matthews AL. What’s new in prenatal screening and diagnosis? Primary Care: Clinics in Office Practice. 2004;31:561-582.
Overview: prenatal tests. American Pregnancy Association website. Available at:
...(Click grey area to select URL)
Accessed December 27, 2016.
Prenatal tests. Kids Health—Nemours Foundation website. Available at:
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Updated June 2013. Accessed December 27, 2016.
Last reviewed December 2016 by Andrea Chisholm, MD
Last Updated: 5/20/2015

 

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