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Signs of a Growth Spurt in a Baby

author image Carissa Lawrence
Based in Gainesville, Carissa Lawrence is an experienced teacher who has been writing education related articles since 2013. Lawrence holds a master's degree in early childhood education from the University of Florida.
Signs of a Growth Spurt in a Baby
Parents might be confused by a baby's increase in hunger.

According to KidsHealth, part of the Nemours Foundations's Center for Children's Health Media, a nonprofit pediatrician-led organization devoted to improving the health of children, babies grow an average of 10 inches in length and triple their birth weights during their first year of life. This growth happens in spurts. The first few growth spurts commonly occur when babies are 10 days old, 6 weeks old, and 3 months old, say expert pediatricians of the Pediatric Associates of Richmond in Virginia. During a growth spurt, infants exhibit certain changes in their everyday patterns. Look out for these signs when determining whether your baby is having a growth spurt or if there's a more serious problem at hand.

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His Stomach Becomes Bottomless

Signs of a Growth Spurt in a Baby
One sign of a growth spurt is an increase in hunger. Photo Credit Jacob Wackerhausen/iStock/Getty Images

A major sign of an infant growth spurt is a sudden and significant increase in hunger. Whether a baby is breast-fed or takes a bottle, he'll want to eat more frequently while he is going through a growth spurt than he normally does. In an article featured on, Dr. Michelle Lampi, growth researcher and associate professor of anthropology at Emery University, says that babies need more calories during growth spurts. While this increased hunger may be overwhelming, it comes with an advantage for mothers who are breastfeeding, because frequent feedings help boost milk supply.

Nighttime? What's That?

Signs of a Growth Spurt in a Baby
Infants wake up more frequently at night during growth spurts. Photo Credit a-fitz/iStock/Getty Images

On the site, Heidi Murkoff, author of “What to Expect When You're Expecting,” states that infants will be up more often at night during a growth spurt. Even babies who have adjusted to a semi-regular sleep schedule, sleeping continuously for 5 to 6 hours, will wake up more frequently for nighttime feedings during a growth spurt. Older babies experiencing growth spurts may also wake up earlier from naps.

She's Suddenly Captain Cranky-Pants

Signs of a Growth Spurt in a Baby
Babies are more irritable when going through growth spurts. Photo Credit Richard Clarke/iStock/Getty Images

It's very common for babies to be more irritable than usual when going through growth spurts. This uncommon crankiness can be attributed to the increased feedings during the night that are associated with growth spurts, according to Dr. Gregory Plemmons, medical director of the pediatric primary-care practice at Vanderbilt Children's Hospital. In a Parents Magazine article, Plemmons explains that if a baby is awake more often during the night to feed, she's not getting the longer periods of rest she needs. If lack of sleep affects adults, imagine what it does to developing babies.

He Sleeps Like the Dead

Signs of a Growth Spurt in a Baby
After babies have bulked up on calories they will sleep longer than they normally would have. Photo Credit Purestock/Purestock/Getty Images

Once babies have bulked up on calories, they need time to allow their bodies to get to work growing. Babies often spend the next few days after the feeding frenzy sleeping longer and more soundly than they normally would. Research on infant growth spurts by Michelle Lampl, PhD, MD of Emory University and Michael L. Johnson, PhD, of the University of Virginia Health System in Charlottesville, in a study published in the journal "SLEEP," found that babies sleep more and sleep longer as a result of growth spurts. The study also noted that boys and girls vary in how they get their extra sleep. While boys tend to sleep for longer periods of time, girls increase the amount of naps they take during growth spurts.

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