[click here for English Units (ounces/inches) and discussion]
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
Sources:
- World Health Organization Child Growth Standards, 2006. Available at: http://www.who.int/childgrowth/en/. To figure average weight gain, we used the weight-per-age percentile charts for birth - 5 years. The range is a combination of boys and girls 5% to 95%, rounded to the nearest 5 grams. Click here for more details on calculations [PDF file].
- Riordan J. Breastfeeding and Human Lactation, 3rd ed. Boston: Jones and Bartlett, 2005, p. 103, 512-513.
- Mohrbacher N and Stock J. The Breastfeeding Answer Book, Third Revised ed. Schaumburg, Illinois: La Leche League International, 2003, p. 148-149
|
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. |
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