No abstract available
MeSH terms
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Adult
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Austria
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Chorionic Gonadotropin* / blood
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Chorionic Gonadotropin* / urine
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Down Syndrome* / blood
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Down Syndrome* / diagnostic imaging
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Down Syndrome* / urine
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Female
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Humans
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Pregnancy
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Pregnancy Trimester, First / blood
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Pregnancy Trimester, First / urine
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Pregnancy Trimester, Second / blood
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Pregnancy Trimester, Second / urine
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Prenatal Diagnosis / economics
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Prenatal Diagnosis / methods*
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Ultrasonography
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United Kingdom
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alpha-Fetoproteins / metabolism*
Substances
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Chorionic Gonadotropin
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alpha-Fetoproteins