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FAQ133, November 2019

Why are tests done during pregnancy? A number of lab tests are suggested for all women as part of routine prenatal care. These tests can help find conditions that can increase the risk of complications for you and your fetus.


FAQ165, September 2019

What is prenatal genetic testing? Prenatal genetic testing gives parents-to-be information about whether their fetus has certain genetic disorders.


FAQ105, July 2019

What is group B streptococcus? Group B streptococcus (GBS) is one of the many bacteria that live in the body. It usually does not cause serious illness, and it is not a sexually transmitted infection (STI). Also, although the names are similar, GBS is different from group A streptococcus, the bacteria that causes “strep throat.”


PFSI008 How the Test Is Done CELL-FREE DNA PRENATAL SCREENING TEST What is it? The cell-free DNA prenatal screening test (also called “cfDNA test”) screens for certain conditions caused by an abnormal number of chromosomes. It does not test for all types of chromosomal disorders. Screening tests are used to estimate whether your baby is at higher risk or lower risk of having a certain condition. Diagnostic tests can give a definite answer about whether the baby has a certain condition. These tests include amniocentesis or chorionic villus sampling (CVS). = maternal ...


FAQ098, May 2019

Why may special tests be needed during pregnancy? Special testing during pregnancy most often is done when there is an increased risk of pregnancy complications or stillbirth. This can occur in the following situations: High-risk pregnancy (a woman has had complications in a previous pregnancy or has a pre-existing health condition such as diabetes mellitus or heart disease) Problems during pregnancy, such as fetal growth problems, Rh sensitization, or high blood pressure Decreased movement of the fetus Pregnancy that goes past 42 weeks (postterm pregnancy) Multiple pregnancy with certa...


FAQ164, January 2019

What is prenatal genetic testing? Prenatal genetic testing gives parents-to-be information about whether their fetus has certain genetic disorders.


FAQ197, October 2018


FAQ027, February 2018

What is the Rh factor? The Rh factor is a protein that can be found on the surface of red blood cells. If your blood cells have this protein, you are Rh positive. If your blood cells do not have this protein, you are Rh negative.


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June 2017

FAQ025, June 2017

What is ultrasound? Ultrasound is energy in the form of sound waves. During an ultrasound exam, a transducer sends sound waves through the body. The sound waves come into contact with tissues, body fluids, and bones. The waves then bounce back, like echoes. The transducer receives these echoes, which are turned into images. The images can be viewed as pictures on a video screen.


FAQ164, September 2015

What are prenatal diagnostic tests? Prenatal diagnostic tests are tests that can detect certain disorders before a baby is born.


American College of Obstetricians and Gynecologists
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