Penis growth is primarily driven by testosterone. This hormone plays a crucial role in the development and growth of the penis and testes. Androgen-dependent growth accounts for a significant portion (70–75%) of an adult male's final penile length.
The Role of Testosterone
Testosterone's influence on penile growth is multifaceted. Research suggests it works, at least in part, through extracellular stromal expansion. This means that testosterone stimulates the growth of the tissues surrounding the penis, contributing to its overall size. Studies involving children with micropenis (abnormally small penis) have shown that hormonal therapy, including testosterone treatment, can positively impact penile growth. https://pmc.ncbi.nlm.nih.gov/articles/PMC3822343/
While testosterone is the primary driver, other factors also influence penis size:
- Genetics: Family history plays a significant role in determining final penis size.
- Environment and Nutrition: These factors can impact overall growth and development, indirectly affecting penis size.
- Other Hormones: Growth hormone deficiency, for example, can also negatively affect penile growth. https://www.hims.com/blog/penis-growth-hormone
Additional Factors Influencing Penile Development
Fetal androgen exposure may play a crucial role in penis development and overall genital development. https://tau.amegroups.org/article/view/58533/html In cases of micropenis associated with insufficient hormone production, treatments with human chorionic gonadotropin (hCG) can show positive results on both gonadal function and penile growth. https://synapse.koreamed.org/articles/1074832
It's important to note that claims about penis enlargement products lack robust scientific evidence. https://www.mayoclinic.org/healthy-lifestyle/sexual-health/in-depth/penis/art-20045363
