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MERCK MANUAL
Consumer Version
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Lab Tests
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Prenatal Cell-Free DNA Screening
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In these topics
Prenatal Testing for Genetic Disorders and Birth Defects
Overview of Brain and Spinal Cord Birth Defects
Overview of General Problems in Newborns
Trisomy 18
Trisomy 13
Overview of Chromosome and Gene Disorders
Down Syndrome (Trisomy 21)