DS is 22 mo and, although his hair has been growing quite a lot, you can still see the veins in his head and he doesn't have a full covering yet.
DH says this is quite common in the UK but where I am from babies tend to be born with mops of hair, and even the blonde ones who are born with little hair generally all have quite a bit more hair by this stage.
People have started asking me in the street how come his hair is not growing and whether he has been ill. Should I be worrying about this or is it usual for Northern European blonde babies?