Sources: National Center for Health Statistics, final natality data. IPUMS-USA, University of Minnesota, www.ipums.org. American Community Survey, US Census Bureau. D'Angelo and others. 2015. "Patterns of Health Insurance Coverage around the Time of Pregnancy among Women with Live-Born Infants - Pregnancy Risk Assessment Monitoring System, 29 States, 20009." MMWR. 64(SS04): 1-19.