my baby is one month and ten days old baby boy he is not gaining weight why

A. Hello mom initial days The baby will tend to lose some weight and then they start to put on weight. Monthly weight gain of about 300 g to 1 KG is ideal and mostly by the age of 4 to 6 months. They double up their birth weight. Try to have and healthy and nutritious food and drink. Before baby feed time as that will ensure good quality milk helps in weight gain.