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|Baby’s Age||Average Weight Gain 1||Average Weight Gain 2,3|
|0-4 months||155 – 241 grams per week||170 grams per week †|
|4-6 months||92 – 126 grams per week||113 – 142 grams per week|
|6-12 months||50 – 80 grams per week ‡||57 – 113 grams per week|
|† It is acceptable for some babies to gain 4-5 ounces (113-142 grams) per week.
‡ The average breastfed baby doubles birth weight by 3-4 months. By one year, the typical breastfed baby will weigh about 2 1/2 – 3 times birth weight. 1
|Baby’s Age||Avg. Length Increase||Avg. Head Circumference Increase|
|0-6 months||2.5 cm per month||1.27 cm per month|
|6-12 months †||1.27 cm per month||64 mm per month|
|† By one year, the typical breastfed baby will increase birth length by 50% and head circumference by 33%.
Source: Mohrbacher N and Stock J. The Breastfeeding Answer Book, Third Revised ed. Schaumburg, Illinois: La Leche League International, 2003, p. 148-149.