California


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Location: California
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Topic: Late preterm by maternal age
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Format: Bar Graph
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Late preterm by maternal age: California, 2015-2017 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 2015-2017 (average) in California, late preterm birth rates were highest for women ages 40 and older (9.7%), followed by women ages 30-39 (6.5%), under age 20 (6.0%) and ages 20-29 (5.7%). 
• Of all infants born during 2014-2016 (average), 4.9% were to mothers under the age of 20, 44.4% were to mothers ages 20-29 years, 46.2% were to mothers ages 30-39 years, and 4.4% were to mothers ages 40 and older. 

Footnotes

  • Late preterm is between 34 and 36 weeks gestation.

Source

  • National Center for Health Statistics, final natality data.
  • Retrieved November 12, 2019, from www.marchofdimes.org/peristats.