my baby birth weight ght is 2.9kg and regained the birth weight in 12 days .now is he is 5 months 23days old and weighs 5.6kg he is only gaining weight 400gms per month and he is too active and meeting his milestone is ok

A. 400 g gain per month is ideally the right weight gain that the child should be having so I don’t see any problem with that for the more you can check with your doctor if you have any kind of a doubt also the Dr save the child is eating milestones time in gaining proper weight gain and there is no problem with that