No abstract available
Publication types
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Comparative Study
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Historical Article
MeSH terms
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Attitude of Health Personnel
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Denmark
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Female
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History, 20th Century
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Humans
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Mass Screening / methods
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Mass Screening / organization & administration
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Obstetrics and Gynecology Department, Hospital / organization & administration*
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Practice Patterns, Physicians'
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Pregnancy
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Surveys and Questionnaires
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Ultrasonography, Prenatal* / history
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Ultrasonography, Prenatal* / instrumentation
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Ultrasonography, Prenatal* / trends