Low muscle tone (hypotonia)
In infancy, it quickly becomes clear that certain milestones are achieved later than the average child. For example, not being able to lift the neck properly in the prone position, having difficulty rolling over, sitting, crawling, standing and walking. Once the child is able to walk, the gross motor skills will remain a challenge as children often have a stiff walking pattern and fatigue easily. Typically, major milestones like cycling and swimming will be achieved later.