Risk Calculator

Determine the likelihood that a woman will have a preterm or low birth weight infant or will have a cesarean birth. Start by answering the four questions on this page.

Besides this risk calculator there are two other pages on this site:

  • Mapping Disparities is a data exploration tool for childbirth data across US states, counties, race, and age.
  • Reducing Risk presents two important ways for a mother to control maternity and infant related risks.


1 Preterm, low birth weight, and cesarean rates for each county and demographic: Centers for Disease Control and Prevention. National Center for Health Statistics. VitalStats (accessed February 10, 2012).
2 Cost and hospital stays for preterm and low birth weight: Russel, et al. (2007) Cost of Hospitalization for Preterm and Low Birth Weight Infants in the United States. Pediatrics (120).
3 Infant mortality for preterm and low birth weight: Infant mortality statistics from the 2007 period linked birth/infant death data set. NVSR. 2011;59(6).
5 Costs and hospital stays for cesareans: HCUP Statistical Brief 110.
7 Underwood, et al. (2007) Cost, causes and rates of rehospitalization of preterm infants. Journal of Perinatology (27).