Onset of puberty in girls has fallen by five years since 1920, Children

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complete State of the World's Children 2000 - Unicef

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Why More Kids Are Starting Puberty Earlier Than Ever Before

Puberty Starts Earlier Than It Used To. No One Knows Why. - The

The Body Project: An Intimate History of American Girls: Brumberg

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Questionnaires and interviews of the FinnTwin16twin cohort in five

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