Girls are starting puberty a year earlier than in the 1970s, study

Researchers found that the age at which girls begin to develop breasts has fallen by about three months per decade since the 1970s.

Analysis of transcriptional changes in the immune system associated with pubertal development in a longitudinal cohort of children with asthma

Puberty Is Starting Earlier—Are Schools Keeping Up?

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

Girls who do not live with both parents more likely to start puberty early - Kaiser Permanente Division of Research

Average Age to Get First Period

Susan Perry, Author at MinnPost - Page 7 of 137

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Why Puberty Seems to Hit Earlier These Days

Study: Kids Hitting Puberty Earlier Than Ever

Puberty Starts a Year Earlier for Girls Now Than in the 1970s

Early starters

Why are girls starting puberty younger?