Pregnancy Week 15 – First Trimester Screen

The First Trimester Screen is a combined screening and is preformed between weeks 11-13 of your pregnancy. You will be receiving blood work and an ultrasound.

The ultrasound measures an area of fluid accumulation at the back of the baby’s neck called nuchal translucency (NT).  This accumulation of fluid is a normal finding.  Increased NT measurements, however, may indicate risk for chromosome abnormalities, congenital heart defects, and other genetic syndromes.

The test is done by drawing blood from the mother and the blood sample is then sent to the laboratory for testing. The ultrasound is performed by an ultrasound specialist or perinatologist and takes between 20 and 40 minutes. The results are calculated within a week of the testing.

If a negative result was found you will go on to get the Quad Screen or AFP in the next couple weeks.

There are no known risks to to the mother and fetus.  Some discomfort can be expected while the blood is drawn.  There is a small risk of a false positive,  parents should be aware that other testing can prove that there are no abnormalities.

This test is given early to help mother’s determine whether they need to undergo additional testing.

 Information Provided by MUSC Health Prenatal Wellness Center “A Guide For Expectant Women” Pamphlet