| ||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 Pittsburgh, late preterm birth rates were highest for women ages 40 and older (13.7%), followed by women under age 20 (11.2%), ages 20-29 (9.8%) and ages 30-39 (8.6%). |
| ||Of all infants born during 2008-2010 (average), 11.0% were to mothers under the age of 20, 50.6% were to mothers ages 20-29 years, 35.8% were to mothers ages 30-39 years, and 2.6% were to mothers ages 40 and older. |
National Center for Health Statistics, final natality data.
Retrieved June 20, 2013, from www.marchofdimes.com/peristats.