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Pediatric Growth Curves

Studies on growth curves for penile length and diameter in boys.

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Jan 12, 2026
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Which studies report penis size percentiles and sample sizes?

Three types of studies report penis-size percentiles and sample sizes: large systematic reviews and nomogram-building meta-analyses that pool many clinic-measured studies, country-level prospective st...

Jan 20, 2026

What are standard stretched penile length reference charts by age and ethnicity?

Standard, widely adopted “stretched penile length” (SPL) nomograms that stratify by both fine-grained age bands and discrete ethnic groups do not exist in the way a clinician might expect for blood pr...