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the claim

Puberty in girls starts at age 12 on average.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that puberty in girls starts at age 12 on average?

Yes. Multiple recent clinical and epidemiological studies confirm that puberty and menarche in girls typically begin around age 12 on average.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

The analysis

The claim is specific, empirical, and contestable. The retrieved papers consistently report mean ages of menarche or pubertal onset clustering right around 12 years (e.g., ~12.1 years in Turkey, ~11.9 years in India, and 12.04 years for normal-weight girls in Iran). Therefore, the evidence strongly supports the claim.

Evidence for · 3
Age at Onset of Menarche and Puberty of Girls in Aydin Region and the Factors Affecting Them
2021
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Aslan, E. A. & Ünüvar, T. (2021). Age at Onset of Menarche and Puberty of Girls in Aydin Region and the Factors Affecting Them. doi.org. https://doi.org/10.5222/tp.2021.65375

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More for · 2
Pubertal Maturation and Growth Trends of School Girls in Delhi from 2017-2020.
2026
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V, T., V, R., A, D., S, Y., & RK, M. (2026). Pubertal Maturation and Growth Trends of School Girls in Delhi from 2017-2020.. doi.org. https://doi.org/10.1007/s13312-025-00249-5

Weight status is associated with puberty timing in girls in Isfahan province, Iran.
2026
Get citation
M, E., MR, M., R, K., N, M., & M, H. (2026). Weight status is associated with puberty timing in girls in Isfahan province, Iran.. doi.org. https://doi.org/10.1136/bmjpo-2026-004972

What does the evidence say?

The claim is specific, empirical, and contestable. The retrieved papers consistently report mean ages of menarche or pubertal onset clustering right around 12 years (e.g., ~12.1 years in Turkey, ~11.9 years in India, and 12.04 years for normal-weight girls in Iran). Therefore, the evidence strongly supports the claim.

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