More or Less: Behind the Stats Are girls starting puberty earlier?
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Jun 4, 2022 Experts discuss the intriguing trend of girls starting puberty earlier than in previous decades. They explore historical data and the complexities of determining puberty onset. The conversation highlights the challenges of distinguishing physiological changes and the influence of factors like obesity. Revelations from the 1980s provide context for today's observations, with a focus on the implications across different racial groups. The need for more research is emphasized to fully understand the psychological and physical effects of this shift.
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Puberty vs. Menarche
- The New York Times incorrectly reported girls start puberty at 12, down from 14.
- Experts clarify the beginning of puberty (breast budding) occurs earlier than menarche (first period).
Early Observations
- Dr. Herman-Giddens noticed girls developing earlier than expected while working at a clinic.
- This prompted her to question the existing norms based on James Tanner's outdated research.
Limitations of Tanner's Research
- James Tanner's research on puberty was considered the standard but had limitations.
- His sample was small, homogenous, and consisted of girls in a post-WWII orphanage, potentially impacting development.