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The digit ratio is the ... length ratio are also influenced by prenatal hormones, and it is postulated that Hox genes responsible for both digit and penis ...
A 1990 study of 109 Chinese men identified the average flaccid stretched penis length of 13.9 cm (5.5 in), and among 14 of the men, the average erect length found was 13.7 cm (5.4 in). [36] Another 1993 study of 104 Chinese men found the average stretched penis length of 13.8 cm (5.4 in), and an average erect length of 13.5 cm (5.3 in). [37]
A study by Swan et al. determined that the AGD is linked to fertility in males, and penis size. [3] Males with a short AGD (lower than the median around 52 mm (2 in)) have seven times the chance of being sub-fertile as those with a longer AGD. It is linked to both semen volume and sperm count. [8]
The study, published Feb. 15 in The World Journal of Men’s Health, examined data from 75 different studies between 1942 and 2021 that recorded the penis size of their study participants.
Pulling data from 17 previous academic papers that included a total of 15,521 men worldwide, researchers in the UK came up with a meta-analysis of what they believe to be the average penis size ...
A large-scale study assessing penis size in thousands of 17- to 19-year-old males found no difference in average penis size between 17-year-olds and 19-year-olds. From this, it can be concluded that penile growth is typically complete not later than age 17, and possibly earlier. [23] [unreliable medical source?]
IT DOES MAKE sense in a way that testosterone would increase penis size, because at one point in your life, it did. But the facts are different as an adult. But the facts are different as an adult.
Photos of the Tanner scale for males. Tanner I testicular volume less than 1.5 ml; small penis (prepubertal) Tanner II testicular volume between 1.6 and 6 ml; skin on scrotum thins, reddens and enlarges; penis length unchanged