Gary Poster, with essential assists from Galyn Norwood, Phiroon Phihakendr, Jose Quijada, Pavandeep Kalra. The truth is, there is a wide range of what s considered normal when it comes to infant weight gain. Your son s weight is likely normal for him, though the average baby weighs about 13 pounds at this age and won t double his or her birthweight until 6 months.
Weight gain is influenced by several factors, however.
Periodically, you can try introducing a bottle of water if you think your baby is getting too much formula. That said, overfeeding is not usually the cause of rapid weight gain in such a young baby. In most cases it has much more to do with the child s genetic body type. Apples and pears tend to retain weight, since they have a slower metabolism and burn fewer calories. Lean bananas have a high metabolism and burn more calories than apples and pears, even though all types may eat similar amounts.