Hi Doc, Goodmorning. My baby is now 3 and half month old and his weight just 5.5 kg , I am worried for weight please suggest. Birth weight - 3. kg

A. Ideally, a baby should double the birth weight by 5th month and till then a gain of 140-200 gms per week is considered fine. Your baby is developing well considering thus and there is no need to be concerned. Keep feeding frequently and fully and atleast 1 time night feed too. From 5th month, you can also start pureed and mashed foods.