No abstract available
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adolescent
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Adult
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Amniocentesis
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Chorionic Gonadotropin / blood*
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Chorionic Villi Sampling
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Down Syndrome / blood
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Down Syndrome / diagnosis
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Down Syndrome / epidemiology
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Down Syndrome / prevention & control*
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Female
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Genetic Counseling
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Humans
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Immunoradiometric Assay
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Israel / epidemiology
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Mass Screening / methods*
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Maternal Age
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Pregnancy
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Pregnancy Trimester, Second
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Prenatal Diagnosis / methods*
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Program Evaluation
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Risk Factors
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alpha-Fetoproteins / analysis*
Substances
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Chorionic Gonadotropin
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alpha-Fetoproteins