Congratulations! You've made it through the newborn days and you now have a 4-month old. Babies at this age can become really fun as they become more aware of the world around them and you get to know their personality a bit more. But, they can also go through some big changes! These changes can impact how they interact with you, how they sleep, how they poop, their feeding schedule, and so much more! Read on to learn more about your 4-month old baby. 4-Month Old Developmental