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Location: Tucson
Topic: Low birthweight by maternal age
Format: Bar Graph
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Low birthweight by maternal age: Tucson, 2011-2013 Average

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• Maternal age is a risk factor for low birthweight, with higher low birthweight rates found among the youngest and oldest mothers in the U.S. 
• In Tucson during 2011-2013 (average), low birthweight rates were highest for women ages 40 and older (10.0%) and ages 30-39 (7.3%) . 
• Of all infants born during 2011-2013 (average), 9.7% were to mothers under the age of 20, 55.7% were to mothers ages 20-29 years, 32.1% were to mothers ages 30-39 years, and 2.5% were to mothers ages 40 and older. 

Healthy people 2020

  • Low birthweight: reduce to no more than 7.8% of live births.


  • Low birthweight is less than 2500 grams (5 1/2 pounds).


  • National Center for Health Statistics, final natality data.
  • Retrieved November 30, 2015, from