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Location: Oakland
Topic: Preterm by maternal age
Format: Bar Graph
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Preterm by maternal age: Oakland, 2011-2013 Average

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• Maternal age is a risk factor for preterm birth, with higher preterm birth rates found among the youngest and oldest mothers in the U.S. 
• During 2011-2013 (average) in Oakland, preterm birth rates were highest for women ages 40 and older (16.2%), followed by women ages 30-39 (8.8%), ages 20-29 (8.4%) and under age 20 (8.1%). 
• Of all infants born during 2011-2013 (average), 6.6% were to mothers under the age of 20, 40.2% were to mothers ages 20-29 years, 47.4% were to mothers ages 30-39 years, and 5.8% were to mothers ages 40 and older. 

March of Dimes 2020 Goal

  • Reduce preterm births to no more than 9.6% of live births.
  • For more information, see here.

Healthy people 2020

  • Preterm births: reduce to no more than 11.4% of live births.


  • Preterm is less than 37 completed weeks gestation.


  • National Center for Health Statistics, final natality data.
  • Retrieved November 29, 2015, from