"Testosterone influencec penile growth"
As this study says:
The effect of testosterone on androgen receptors and human penile growth
"CONCLUSIONS: Testosterone influences penile growth, possibly as a result of extracellular stromal expansion. The number of androgen receptor positive cells in the human fetal penis did not change among the castrate, normal and super testosterone hosts. These experiments support the hypothesis that penile growth cessation is mediated by mechanisms other than down regulation of the androgen receptor. Furthermore, these data support the hypothesis that early administration of androgen to prepubertal male individuals does not result in a shorter phallus in adulthood."
Goal:8" BPEL
5.25" MSEG