The new abilities your baby learns as she grows are commonly referred to as developmental milestones. This eMedTV article further describes how your healthcare provider will track the progress of your child's developmental milestones.
By the time your baby is three months old, he or she may have reached several developmental milestones. This eMedTV resource takes an in-depth look at these infant developmental milestones, including physical, language, fine motor, and personal skills.
As this eMedTV page discusses, some of the infant developmental milestones for babies age 3 to 6 months may include rolling over in both directions and smiling and laughing spontaneously. This article further describes other developmental milestones.
As this eMedTV page explains, sitting up unassisted, waving bye-bye, and passing small objects to you are some of the possible infant developmental milestones your baby may achieve by 6 to 9 months of age. Other milestones are also listed.