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Puberty and genital growth

The relationship between puberty timing and final adult genital size in males, with genetics and tempo influencing growth more than age of onset.

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Jan 18, 2026
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How common is macropenis and are there age or geographic variations in prevalence?

Macropenis (also called megalopenis or macrophallus) is described in the medical literature as an objectively large penis—commonly defined as length more than 2 standard deviations above the populatio...

Jan 6, 2026

Do most 13 year old boys want to have a bigger penis than their peers?

Most clinical and educational sources show that concern about penis size and comparisons with peers are common during puberty—boys “wonder how it measures up” and anxiety about normality is frequently...