My baby nurses one side at a time (he is 9 days old and fills up with only one boob). So I alternate breasts each time he eats. I never skip a side, and he's usually on each breast for the same length of time (15-20mins).
But, I've noticed my right boob never gets as full as the left in between feedings? Why would that be? I offer that breast just as frequently as the other, I don't know why it would be producing a different amount??