I have a theory that these first words, which are desperate and needy parenting hears yearn to hear, have more significance than we give them credit for.
I mean there are many they can pick from, most of us and phonetically introducing them to new sounds as soon as they can focus "Duh-O- Guh" we over pronounce as the family pet skulks out of the room in search of some attention. So the one's they choose surely have to be important, it can't be down to just chance. I predict my children's fist words are an indication to their future career.
Eldest - "chicken" - vet/farmer
Youngest "ball" - sportsman/juggler
I will keep you updated in -" A modern parent's encyclopedia; the final years"