New York

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Location: Brooklyn
Topic: Late preterm by maternal age
Format: Bar Graph
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Late preterm by maternal age: Brooklyn, 2012-2014 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 2012-2014 (average) in Brooklyn, late preterm birth rates were highest for women ages 40 and older (8.8%), followed by women under age 20 (7.0%), ages 30-39 (6.4%) and ages 20-29 (5.6%). 
• Of all infants born during 2012-2014 (average), 4.0% were to mothers under the age of 20, 47.0% were to mothers ages 20-29 years, 44.3% were to mothers ages 30-39 years, and 4.8% were to mothers ages 40 and older. 


  • Late preterm is between 34 and 36 weeks gestation.


  • National Center for Health Statistics, final natality data.
  • Retrieved April 27, 2017, from