Breastfeeding - Infant gains Weight

Breastfed infants generally gain weight according to the following guidelines:

0–4 months: 170 grams per week†
4–6 months: 113–142 grams per week
6–12 months: 57–113 grams per week

† It is acceptable for some babies to gain 113–142 grams (4–5 ounces) per week. This average is taken from the lowest weight, not the birth weight.

The average breastfed baby doubles birth weight in 5–6 months. By one year, the typical breastfed baby will weigh about 2½ times birth weight. At one year, breastfed babies tend to be leaner than bottle fed babies. By two years, differences in weight gain and growth between breastfed and formula-fed babies are no longer evident.