my baby 5 month old and her weight is 4 kg 600 gm.. what the ideal weight and what can we do to gain the baby weight???

A. I Don’t know the birth weight of your child but looking at the current weight of your child as per the age of your child I would say it is less you know a child should be at least 6 to 7 KG by completing the age of six months on an average or the double of birth weight