Lifts head symmetrically to 45°-90° at midline w/o bobbing1,6
Shifts more weight to upper abdomen6
Rocking toward hips continues1
Lower extremities symmetrical, extension, external rotation1
Random antigravity kicking begins1
Lateral weight shift to face side1
Forearm propping, shoulders abduction, elbows in line with shoulders in horizontal plane, not yet directly under shoulders6
Uses symmetrical arm and shoulder girdle activity to shift weight to upper abdomen and femurs.1,6
Sole-to-sole play in prone and supine; antigravity kicking in prone and supine
Lateral weight shifting towards the face side in prone; clasps hands together
Head held midline at 45-90 degrees with no bobbing; shoulders abduction and internal rotation