My question is pretty simple: can your hair begin miniaturizing at different times? For example: let’s say you start losing your hair in the vertex area first; then, maybe a few years later you start thinning in the crown area as well? Does this just mean that your body is playing catch-up, or does it mean that the end result is total loss in one area versus partial in another?
We do not bald symmetrically, so your observations are correct. The patterned hair loss which everyone references generally does not occur uniformly. Miniaturization varies by part of the scalp and the genetic patterns you inherit. Although most hair loss is started with signs of miniaturization, sometime this miniaturizing does not show and the hair loss occurs anyway. The time line for miniaturization and balding varies between people and can be erratic.