Measuring typical weight gain

How much weight should a baby gain?

On average, a baby should gain about 200 to 250 grams (7 to 9 ounces) per week for the first few weeks. That rate slows as the baby gets older. It is best to follow a baby’s weight gain on a growth chart that compares the baby’s gain with that of others born at a similar weight and gender and after a pregnancy of similar length.

A) Typical weight gain

In the first two to four days after birth, the baby’s weight will usually drop. Once a baby returns to its birth weight, weight increases quickly for the first few months. On average, a breastfed baby should gain about 200 to 250 gm (7 to 9 oz) per week for the first few weeks (de Onis 2009). The rate of gain slows as the baby gets older.

Because the rate changes, it is best to follow the baby’s progress on a growth chart. This chart compares one baby’s weight gain with that of other babies who are born at a similar weight and gender, and after a similar number of weeks of pregnancy.

References

de Onis M, Garza C, Onyango AW, et al.; le Comité de nutrition de la Société française de pédiatrie. [WHO growth standards for infants and young children]. [Article in French] Arch Pediatr. 2009 Jan;16(1):47-53