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Penile development and hormones

The role of genetics, testosterone, growth hormone, and IGF-1 in determining penile size during gestation and puberty.

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Jan 15, 2026
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At what age does the penis typically reach final adult size?

Most males reach their final penis size around the end of puberty — commonly by the late teens — with medical sources clustering the typical age range between about 16 and 21 years old, and many citin...

Jan 21, 2026

What are the common causes of penis enlargement due to medical conditions?

from medical causes is uncommon and usually stems from true biological changes (), deliberate medical or cosmetic interventions (), or transient changes from vascular events; much of what people inter...