Just because you have not seen any babies without hair at a year old does not mean that they do not exist, and that all babies have a head of hair at a year old. Unless you have seen every baby in the world through all of time to verify that this is true and a matter of fact ... This seems to be such an important issue for you that at one Maud Angelica does not have hair yet, are you suggesting that there is something "unusual" or "odd" about Maud Angelica because of this?
Looking at the 2 pictures Josefine posted, I think norwegianne is right in that Maud Angelica has very fine hair, almost like peach fuzz it seems.