No abstract available
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Chorionic Gonadotropin, beta Subunit, Human / blood*
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Chorionic Gonadotropin, beta Subunit, Human / genetics
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Chromosomes, Human, Pair 18
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Down Syndrome / blood
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Down Syndrome / diagnosis
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Feasibility Studies
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Female
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Humans
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Prenatal Diagnosis / methods*
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RNA, Messenger / blood
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Reverse Transcriptase Polymerase Chain Reaction
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Trisomy / diagnosis*
Substances
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Chorionic Gonadotropin, beta Subunit, Human
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RNA, Messenger