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Professional
Consumer
MERCK MANUAL
Consumer Version
HEALTH TOPICS
HEALTHY LIVING
SYMPTOMS
EMERGENCIES
DRUG INFO
RESOURCES
COMMENTARY
ABOUT US
HEALTH TOPICS
HEALTHY LIVING
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Lab Tests
Prenatal Cell-Free DNA Screening
In these topics
Prenatal Testing for Genetic Disorders and Birth Defects
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Overview of Chromosome and Gene Disorders
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Down Syndrome (Trisomy 21)
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Trisomy 18
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Trisomy 13
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Overview of General Problems in Newborns
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Overview of Brain and Spinal Cord Birth Defects
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Prader-Willi Syndrome
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