hello doctor my baby is 9 months now n he is premature born on34 th week..c section.. he still can't able to lift his head n didnt rolled over yet. when v concerned peadiatric neurologist they said he s having very week muscles and suggested Physiotherapy for 2 months n suggested some medicines to increase his strength.. I just wanted to know why muscles becomes week in such a small baby..when will he roll over..whether he will become normal..plse answer.. thanks