| ||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 2008-2010 (average) in Indianapolis, late preterm birth rates were highest for women ages 40 and older (11.4%), followed by women ages 30-39 (9.5%), under age 20 (8.8%) and ages 20-29 (8.6%). |
| ||Of all infants born during 2008-2010 (average), 11.6% were to mothers under the age of 20, 57.5% were to mothers ages 20-29 years, 29.0% were to mothers ages 30-39 years, and 1.9% were to mothers ages 40 and older. |
National Center for Health Statistics, final natality data.
Retrieved May 23, 2013, from www.marchofdimes.com/peristats.