hereditary lifey. did the hair just start greying or did they start falling out/getting thin in your mother's case?
ps: oh and by the way.. was reading some stuff in the internet about hair loss and stuff and found out that genes that you get from your mother side is like the key factor of how much/less you'll be going bald.. so if your naana ji had good head of hair.. you're lucky...you might have your hair for some long time.. ofcourse balding is just the problem of men and thought i'd just share that.