Your baby spent 40 weeks in a quiet, warm, dark womb, and suddenly emerges in a loud, bright, open world. (The guy with the camera! The lights! The booming voices!) Talk about a trippy transition. From her first day on Earth, your newborn is full-out using the senses that she developed in utero. The overwhelming onslaught of sights and sounds is more than enough to warrant some crying from your little blueberry.