How do you spot a new mom?

You can spot a new mom by the callous on her hand from carrying the infant car seat. I noticed a few weeks ago a rough spot on the palm of my hand and couldn't figure out what it was from. I finally realized that it was from lugging around Elly in her car seat. She only weighs about 10 pounds now, but that seat is a booger to carry to and fro! Can't wait until she starts walking...but then we will have a whole new set of challenges! Ahhh, parenthood!