Although rare, some men retain their juvenile hairlines for some time. For most men, recession begins at the temples, slowly advancing into a Norwood 3 pattern. Occasionally, the frontal area of the scalp will retain most of its hair; we refer to this as a “persistent forelock”. David Letterman toward the end of his tenure as Late Night talk show host is a good example of this persistent forelock pattern.
Most young men experience some concern about their hairlines as they enter their 20s (or 30s, if they’ve retained a full hairline up to that point). It is common for men to over-analyze their hairlines, scrutinizing every perceived change in the hairline. Although it is not completely trivial to do so, a Norwood 2 is a healthy, mature hairline that is not a good candidate for hair transplantation.