How Much Weight Should a Baby Gain Each Week?

Every baby is an individual with his or her own growth pattern. Still, steady weight gain during a baby's first few months is an important indicator of overall health.

Initial Weight Loss

Babies normally lose several ounces of their birth weight in their first few days---about 5 to 7 percent, according to the book, Great Expectations: Baby's First Year.

Overall Weight Gain

According to standards developed by the National Center for Health Statistics, a typical baby will regain his birth weight by two weeks postpartum, double his birth weight by six months and triple it by his first birthday.

Average Weekly Weight Gain

• First four months: 4 to 7 ounces per week
• Four to six months: 3 to 5 ounces per week
• Six to 12 months: 3 ounces per week

Breastfed and Formula-Fed Babies

Many breastfed babies gain weight less quickly than their formula-fed counterparts, especially after the first six months. The World Health Organization has developed a growth chart for breastfed babies. Other infant growth charts are based primarily on formula-fed babies.

Off the Charts

Weight gain is only one factor in evaluating a baby's health. Length, head circumference, alertness, demeanor and the achievement of developmental milestones are also considered. Be sure to discuss any weight concerns with your pediatrician.

References

• Great Expectations: Baby's First Year; Sandy Jones and Marcie Jones; 2007
• American Academy of Pediatrics New Mother's Guide to Breastfeeding; Joan Younger Meek; 2002

Resources

• National Center for Health Statistics U.S. Growth Charts
• The WHO Child Growth Standards