No abstract available
MeSH terms
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Anencephaly / chemically induced*
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Anencephaly / epidemiology
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Estrogens / adverse effects*
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Female
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Humans
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Pregnancy
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Pregnancy Tests
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Progestins / adverse effects*
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Risk Factors
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Spain
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Spina Bifida Occulta / chemically induced*
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Spina Bifida Occulta / epidemiology