Forearm propping1,6
Arms abduction and elbows in line with shoulders6
Rotates head, shifting weight over shoulder on face side6
Subtle weight shift, maintained at mid-chest1
Reaches with mouth6
Tires easily in this position6
During prone on elbows, elbows in are in line with shoulders in horizontal plane
While prone infant reaches with the mouth
Head held midline at 45-90 degrees with no bobbing; shoulders abduction and internal rotation