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

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No one is sure what is causing the change

TMHS 638: Early Onset Puberty Is Surging In Children - The Model

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

United States: fertility rate 1800-2020

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

Children From Poor Families Show Signs Of Puberty Faster; Health

6. Pubertal status and emotional, school and social functioning

Frontiers The critical BMI hypothesis for puberty initiation and the gender prevalence difference: Evidence from an epidemiological survey in Beijing, China