Penis erection 12 cm long, 3 cm thick, is this normal?

Patient's question:

My penis is erect to 12 cm, 3 cm in diameter, is this normal, can the penis still grow, how can I promote penis growth?

Doctor's answer:

Hello! The length and thickness of the penis are related to factors such as personal development, hormone secretion, genetics, and race. Due to individual differences, everyone's development status is different. As long as it can perform normal sexual life after erection, it is considered normal. Based on the data you provided, the development of your reproductive organ is basically normal.

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