Worldwide Secular Trends in Age at Pubertal Onset Assessed by Breast Development Among Girls

C Eckert-Lind, A Busch, J Petersen, F Biro, G Butler, E Bräuner et al.. JAMA Pediatrics. 2020.

Published 2026-10-15Sources checked 2026-10-151 sourceEverstack research teamHow we work

In plain language: Age at breast development onset fell about 0.24 years per decade, 1977 to 2013.
Limits: Methods vary across studies.
Source: doi.org/10.1001/jamapediatrics.2019.5881 · PubMed 32040143 · Free full text

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