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They Grow So Fast: A Parent’s Guide to Growth Charts

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Since 1977, healthcare providers in the United States have used pediatric growth charts to see how kids stack up. It’s important to track a child’s growth rate over time, but keep in mind that no one number tells the whole story.

Choosing a Chart

For children up to age 2, the growth charts from the World Health Organization (WHO) are the gold standard, says the Centers for Disease Control and Prevention (CDC). To develop these charts, researchers looked at optimal growth patterns for young children in six countries, including the United States. The charts take into account the growth patterns for infants who are mainly breastfed for at least four months and who are still breastfeeding at 12 months.

The WHO charts are designed to measure children of any ethnicity and socioeconomic status, regardless of whether they are breastfed or formula-fed. Some of the indicators measured include weight for age, weight for length/height, head circumference for age and triceps skinfold (the amount of skin that can be pinched on the back of the upper arm) for age.

After your child is older than age 2, you can switch to using the CDC growth charts as a guide. These charts can be used all the way through young adulthood up to age 19. To see the charts, visit CDC.gov/GrowthCharts.

How to Read the Charts

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Dieter Sumerauer, MD

Here’s how growth charts work. Let’s say you want to look at the height of your son based on his age, and he’s 3 feet 5 inches tall at age 4. You would find the stature-for-age chart for males. On the left side, look for the entry that’s closest to his age. Once you find that row, look across to find his height. Then, follow that column up to the top to find his percentile. In this example, the boy would be just under the 75th percentile, which means he is as tall or taller than 75 percent of all 4-year-old boys, and shorter than 25 percent of them.

“Keep in mind that a growth chart is just one item in a pediatrician’s and parent’s toolkit to measure how a child is developing,” says pediatrician Dieter Sumerauer, MD, Regional Medical Director for UH Rainbow Babies & Children’s Primary Care Institute.

“If you have any concerns, talk with your child’s doctor. He or she will use the growth charts to monitor your child over time," he says.

For instance, if your daughter has always been around the 50th percentile for weight and then drops down to the 10th percentile, it might be an indication for further evaluation. But if she has always been near the 10th percentile, and her parents are on the smaller side, her weight may be just fine, he says.

Remember, a percentile isn’t like a grade in school. Higher or lower isn’t better – it all depends on how your individual child is growing.

“If you have any questions about your child’s development, you should always bring them up with your child’s pediatrician,” Dr. Sumerauer says.

Related links

Find a UH Rainbow Pediatric Practice Near You

Find a UH Rainbow Urgent Care

Find a UH Rainbow ER

 

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