As your parent of course wish your baby weight always mount. Way of precisely to determine normal growth of your baby with measuring and comparing between weight and is height. This measurement must be done each month and its result is registered in graph form [in] health book. So as long as your baby’s body weight still in normal range, you don’t need to be worry.

Weight and height according to age

High and Heavy according to age
Age 0-12 months, without differentiating gender

One of the factor influencing heavy of your baby is diet. Baby getting breast milk and baby getting formula milk have different growth level. Generally, addition of weight of baby who have breast milk more slower so the baby seen slim. This because the existence of excess of dilution retention and difference of body fat composition at baby getting formula milk

Body’s weight according to its height
Age 0-12 months, without differentiating gender