I don't have an answer for you, but my baby was just diagnosed with hip dysplasia today and this was one of the things I noticed that first caught my attention mine too. Her back is haunched up ever so slightly. I suspect it brings her (mine) a bit of comfort or takes some weight (she only weighs 6 lbs) off her hips especially after playing hard. I hope your baby doesn't have anything like this, but maybe something to put in the back of your mind if she doesn't stop carrying herself like that. And, I like her hair!
