Birth Defects Testing (cont.)
IN THIS ARTICLE
First Trimester Tests
The nuchal translucency test and the first-trimester blood tests are often done together in what is called the first-trimester screening.
First-trimester tests can be done at around 10 to 13 weeks of pregnancy, depending on the test. Many doctors use a number of tests together, based on what is available.
The first-trimester screening may also be called the combined first-trimester screening or the combined screening. This screening is about as accurate as the quad screening, which is done later in pregnancy.1
First-trimester tests also can be done as part of an integrated screening test. This test combines the results of the first trimester tests with those of a second trimester test (the triple or quad screening).
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