Baby having slow growth problem.

Sir, my daughter is 8 months old and having slow growth. She looks very thin and weight is 7kg. She achieved her milestone in correct time and also she is active. When i see other baby of same age i feel so badly about my daughter. Her cc is 42 and head cr is 43. Is there any problem? Please help!

 

 

 

Baby having slow growth problem.
Paediatrics