I have inverted/flat nipples and was always insecure growing up about them. My son doesn’t have them, he’s 18 months so I can tell. My daughter is only 3 months old and something I see her and think oh good she’s not going to have them and other times when she’s cold it does look inverted. I know it may be too soon to tell, but does anyone have a baby that they know for sure does or does not have this and what age are you certain that you can tell? Any clue?