The figure shows trends in the prevalence of gastroschisis over time, by mother's age. Researchers used data from population-based birth defects tracking programs in 15 states from 1995-2005. Participating states were: Arizona, Arkansas, California, Colorado, Georgia, Iowa, Kentucky, New Mexico, New York, Oklahoma, North Carolina, Rhode Island, Texas, Utah, and Washington. When data from these 15 states were combined and looked at by mother's age, the increase in prevalence of gastroschisis was seen among all maternal age groups under 30 years old, but not for those 30 and older. In particular, among babies born to teen mothers (younger than 20 years), gastroschisis increased from about 8 per 10,000 live births in 1995 to about 15 per 10,000 live births in 2005.