No abstract available
Publication types
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Research Support, Non-U.S. Gov't
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Twin Study
MeSH terms
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Adult
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Estrogens / blood
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Estrogens / physiology*
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Female
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Humans
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Male
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Middle Aged
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Pregnancy
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Prenatal Exposure Delayed Effects
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Semen / chemistry
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Sperm Count*
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Spermatozoa / chemistry*
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Twins, Dizygotic
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Twins, Monozygotic