No abstract available
Publication types
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Comment
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Comparative Study
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Letter
MeSH terms
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Case-Control Studies
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Contraceptive Agents, Female / adverse effects*
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Female
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Humans
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Intrauterine Devices, Copper / adverse effects*
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Intrauterine Devices, Medicated / adverse effects*
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Levonorgestrel / adverse effects*
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Pregnancy
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Pregnancy, Ectopic / epidemiology
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Pregnancy, Ectopic / etiology*
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Randomized Controlled Trials as Topic
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Risk Factors
Substances
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Contraceptive Agents, Female
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Levonorgestrel