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Belladelli et al.

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Dec 22, 2025
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Which studies report country-level penis-size averages and how were their samples collected and corrected?

Multiple academic systematic reviews and meta-analyses synthesize raw studies of penile measurements, while several public “country-by-country” compilations (DataPandas, WorldData, VisualCapitalist, W...

Dec 12, 2025

Have average erect penis lengths changed over time according to recent research?

Recent reviews and media coverage report an increase in average erect penis length in recent decades: a 2022 systematic review cited by Healthline and other outlets found a possible rise (for example,...

Dec 8, 2025

Are there peer-reviewed meta-analyses comparing penile length by ethnicity in Europe?

There are peer‑reviewed meta‑analyses that compare penile length by geographic region (including Europe) but very few that explicitly compare penile length by self‑reported ethnicity within Europe; la...