FIGURE 1.

Neural tube defect prevalence by race/ethnicity for 25 surveillance programs: National Birth Defects Prevention Network, United States, 1995–2007.

Note. Fortification refers to the 1996 US Food and Drug Administration mandate that by January 1, 1998, all enriched cereal-grain products (e.g., wheat flour and related products, corn meal, and rice) would be fortified with folic acid at 140 μg per 100 g of product.¹⁰Source. Centers for Disease Control and Prevention.¹⁸