Legs come together
3 - 4 months
Head held to one side
0 - 3 months
Hands are predominantly open
5 - 6 months
Lower back flattens against the floor
3 - 4 months
Able to reach for toy with one or both hands
5 - 6 months
Chin is tucked and neck lengthens in back
3 - 4 months
Able to turn head side to side
0 - 3 months
Holds head in midline
3 - 4 months
Brings feet to mouth
5 - 6 months
Brings hands to feet
5 - 6 months
Lifts head independently
5 - 6 months
Head lag is gone when pulled to a sitting position
4 - 5 months
Equilibrium reactions are present
7 - 8 months
Hands are together in space
4 - 5 months