Study: More U.S. girls starting puberty early

Girls in the United States are entering puberty at earlier ages than they have in the past, a new study reports.

How Girls Are Developing Earlier In An Age Of 'New Puberty

Why are people proud of not being helped? - Quora

Physical changes in puberty

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

Childhood Weight Tied to Timing of Puberty – TPMG Excellence

Why is puberty coming earlier for girls today?

Teenage pregnancy - Wikipedia

Early starters

Environmental Factor - April 2021: Obesity may affect puberty