This has been true of both my children, despite what is common knowledge in both the US and Denmark, my children actually gained weight from the getgo. With my son I would attribute it to a neurotic level of nursing, my daughter wasn't so manic, so I guess it is because neither had any trouble figuring out how to nurse and that I have really really fattening milk. I've been told that it's impossible to get a breast fed baby as plump as a bottle fed baby, but my Walter whale was absolutely huge, rolls upon rolls of fat and at a year, when I went to ween him, he was still drinking Mama's milk ten times in a day. No supply problems here. I clearly make a superior dairy cow!