No abstract available
MeSH terms
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Adult
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Amniocentesis
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Aneuploidy
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Chorionic Gonadotropin, beta Subunit, Human / blood
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Chromosome Disorders / diagnosis*
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Chromosome Disorders / genetics
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Chromosomes, Human, Pair 18 / genetics
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DNA / blood
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DNA / genetics*
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Female
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Humans
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Nuchal Translucency Measurement
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Peptide Fragments / blood
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Polymerase Chain Reaction
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Pregnancy
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Pregnancy Trimester, First
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Pregnancy, High-Risk
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Pregnancy-Associated Plasma Protein-A / metabolism
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Prenatal Diagnosis
Substances
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Chorionic Gonadotropin, beta Subunit, Human
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Peptide Fragments
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urinary gonadotropin fragment
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DNA
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Pregnancy-Associated Plasma Protein-A
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PAPPA protein, human
Supplementary concepts
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Chromosome 18, tetrasomy 18p