In addition, doctors will look for some basic developmental milestones at each visit. Here are some examples from the 9-, 18-, and 30- or 36-month visits. Visit Milestones 9 months Rolling both sides, sitting with support, motor symmetry, grasping and transferring objects between hands. 18 months Sitting, standing, and walking independently; grasping and manipulating small objects. 30 months Subtle gross motor errors, looking for loss of previous skills (marker of progressive disease).
