why my baby has lower weight compared to who standards is this common in all babies? standard weight 6.7 and above my baby weight 6.5

A. Okay I must tell you it is just an average it is not applicable for all the kids because as per general standard energy evaluate the weight of your child on the basis of gain of 500 g in a month on top of the birth weight so you should look for those standards to meet as of now if that is there then it is okay and 200 g 300 g plus or minus really will not make a difference