No abstract available
MeSH terms
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Adolescent
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Adult
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Case-Control Studies
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Female
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Gonadal Steroid Hormones / blood*
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Gonadotropins, Pituitary / blood*
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Humans
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Oligomenorrhea / blood*
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Physical Education and Training*
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Sports*
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Statistics, Nonparametric
Substances
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Gonadal Steroid Hormones
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Gonadotropins, Pituitary