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First Trimester
Down Syndrome Screen
Formal name: First Trimester Screen – Pregnancy-associated plasma protein-A (PAPP-A), human chorionic gonadotropin (hCG), as either free beta subunit or total hCG, and a nuchal translucency ultrasound Related tests: Triple/Quad Screen, total hCG
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Ask the Lab
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If you still have a question about your test or need help
interpreting the results of your test, you can visit the ASCLS web site to
complete a lab testing information request form, and a certified clinical
laboratory scientist will gladly help you! Your communication will be kept
confidential. Go there now.
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This article was last reviewed on
July 5, 2007.
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