Estimating baby's size gets more precise

April 28, 2014

New Michigan State University research aims to help doctors estimate the size of newborns with a new set of birth weight measurements based on birth records from across the country.

"More than 7 million records were reviewed," said Nicole Talge, an assistant professor in MSU's Department of Epidemiology and Biostatistics, who co-led the study which is now available in the journal Pediatrics.

"Our research looked at in the United States during 2009-2010 and using a newly developed method, corrected unlikely gestational ages during that time. This led to changes in the birth weight thresholds, especially for preterm and post-term babies."

Talge added that these thresholds are important because they can be used to classify a baby as small or large for .

As a result, her findings have helped introduce an updated and potentially more precise way to evaluate a baby's birth size.

During its research, the team's method compared the last menstrual period of the mother and the estimated gestational age of the fetus against the actual of the baby when born to identify that had the likely errors.

Since birth size is often used as one indicator of a baby's health, these new thresholds may be useful for clinicians in making health care decisions. Researchers also may benefit from more precise estimates of birth size when investigating health outcomes at birth and later on in life.

"It's important to remember that birth size is only one piece of the puzzle when it comes to evaluating a baby's health," said Talge.

Explore further: Late-preterm babies at greater risk for problems later in childhood

More information: pediatrics.aappublications.org/content/early/2014/04/22/peds.2013-3285.abstract

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