Micropenis: adult follow-up and comparison of size against new norms.

In eight cases of micropenis, the follow-up period was from childhood through adulthood (age range 22 to 31). Topical treatment of the penis with testosterone propionate in childhood increased its size relative to the rest of the body before adolescence. In adolescence and adulthood, the penis with a prior history of treatment with testosterone (N = 5) had no size advantage over the untreated one (N = 3). Topical testosterone postponed the age of developing a coping strategy, but not the necessity of developing one. New data (N = 65) for the stretched length of the adult penis give a M +/- SD of 16.69 +/- 1.90 cm, or 6.57 +/- .75 inches.