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Is puberty starting earlier?

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Many experts say that, on average, puberty is starting earlier in the U.S. than it did in the past. The average age of menstruation has stayed roughly the same. Yet studies suggest that early signs -- like breast development -- are happening a year earlier than they did decades ago.

Puberty starts on average in girls between ages 8 and 13 and in boys between ages 9 and 14.

SOURCES:

Carel, J. , April 2009. Pediatrics

eMedicine: "Precocious Puberty."

Ahmed M. , 2009. Trends in Endocrinology and Metabolism

Carel J. , May 29, 2008. New England Journal of Medicine

Cesario, S. May/June 2007. Journal of Obstetric, Gynecologic, & Neonatal Nursing,

The Hormone Foundation: "Hormones & You."

eMedicine: "Precocious Pseudo-Puberty."

Aksglaede L. , May 2009. Pediatrics

National Institute of Environmental Health Sciences: "Endocrine Disrupting Effects of BPA on Puberty and Estrogen Cycles."

Reviewed by Renee A. Alli on June 13, 2017

SOURCES:

Carel, J. , April 2009. Pediatrics

eMedicine: "Precocious Puberty."

Ahmed M. , 2009. Trends in Endocrinology and Metabolism

Carel J. , May 29, 2008. New England Journal of Medicine

Cesario, S. May/June 2007. Journal of Obstetric, Gynecologic, & Neonatal Nursing,

The Hormone Foundation: "Hormones & You."

eMedicine: "Precocious Pseudo-Puberty."

Aksglaede L. , May 2009. Pediatrics

National Institute of Environmental Health Sciences: "Endocrine Disrupting Effects of BPA on Puberty and Estrogen Cycles."

Reviewed by Renee A. Alli on June 13, 2017

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What are signs of early puberty?

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