What are some important milestones for infants who are 3 months old, and how do they compare to those for infants who are 0-3 or 3-6 months old"?

Answer 1

At 3 months old, infants start to smile, track objects with their eyes, and make cooing sounds. They may also start to push up on their arms during tummy time. These milestones are different from those of infants 0-3 months old, who mainly focus on basic reflexes like sucking and grasping, and infants 3-6 months old, who may start to roll over, reach for objects, and babble more.