My baby boy van lift his head to the side and sometimes the front . He also pushes with his feet and arm i say arm bc he cant get the other one from under him . But when he pushes he only moves forward and to the left side

My twin baby girl was lifting her head almost at 1 month. But my twin boy is not really lifting his head at 3 months. Twin girl now is very good at lifting her head at 3 months