No abstract available
MeSH terms
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Adult
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Contraception / methods*
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Contraception / statistics & numerical data
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Contraception / trends*
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Contraception, Immunologic / methods
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Contraceptive Agents
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Contraceptive Devices / statistics & numerical data
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Female
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Humans
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Male
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Pregnancy
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Research Design
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Sterilization, Reproductive / methods
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United States