Average weight gain for a breast fed baby

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


  1. 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].
  2. Riordan J. Breastfeeding and Human Lactation, 3rd ed. Boston: Jones and Bartlett, 2005, p. 103, 512-513.
  3. 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%.


0 #1 Native Garcinia 2015-10-06 09:32
Its not my first time to visit this site, i am browsing this web page dailly and obtain pleasant information from here daily.

What I Do

I am living my dream while working with mums and babies. I see mums when they are 34 weeks pregnant and then go to their homes once they go into labour. I stay for the full duration of the labour and after the birth I assist them with breast feeding. I do another visit after the birth to see that all is well and to help where I can.  Mums are always welcome to call me in the event that they have any questions, whether before or after the birth. I am passionate about my work as a doula and I care and love all the families with which I work. Once you have been present at a birth you feel part of the family and it’s wonderful to hear news of the new baby’s life as he or she grows.

Ovulation Predictor

Please select the first day of your last menstrual period:

/ /

Usual number of days in your cycle:

What is your due date?

Date of your last menstrual period:

Baby Development

Baby Development Calendar