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Tanner stages and penile growth

Penile size at age 13 is linked to Tanner stages rather than chronological age, with growth accelerating between certain stages.

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Jan 16, 2026
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What are the average flaccid and stretched penile lengths for Tanner stage I through V?

Clinical staging of male puberty (Tanner I–V) correlates with predictable increases in penile size, but precise average values for flaccid and stretched penile length (SPL) by Tanner stage are heterog...

Jan 7, 2026

How does penile growth progress from preadolescence to late adolescence?

Penile growth from preadolescence to late adolescence follows a predictable, hormonally driven sequence tracked clinically by the Tanner (sexual maturity rating) system: testicular enlargement signals...