| ||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 Miami, late preterm birth rates were highest for women under age 20 (12.4%), followed by women ages 40 and older (11.6%), ages 30-39 (11.1%) and ages 20-29 (10.5%). |
| ||Of all infants born during 2008-2010 (average), 9.9% were to mothers under the age of 20, 50.9% were to mothers ages 20-29 years, 35.8% were to mothers ages 30-39 years, and 3.4% were to mothers ages 40 and older. |
National Center for Health Statistics, final natality data.
Retrieved May 19, 2013, from www.marchofdimes.com/peristats.