Baby talk

My 1 yr 1month baby says words (babbling) but doesn’t necessarily put meaning to them. For example he will call his daddy “mama”. Or just say “mama” in general but not know that I’m his mama. Anyway, he says the word “baby” A LOT and I’m wondering if he says it because I’m about to give birth any day now and that he knows his little brother is a baby. I’d like to think this but he prob is just saying the word without knowing the meaning. Do any of your one year olds says “baby” a lot ?