e’re all familiar with the following scenario: you’re holding a baby, cooing over how cute she is, when suddenly the shoulder of your favorite shirt is covered with spit-up. If she’s someone else’s baby—great. You wrinkle your nose, hand her back, and start dabbing the undigested milk or formula off your clothing. If she’s your baby, well…this is probably the third time you’ve been spit-up on this morning, so chances are you don’t even bat an eyelash.