- The high NTD prevalence seen in Cameron County in the early 1990s dropped somewhat in the subsequent years, but levels remain high along the border

- Mexican American women migrating to the US have NTD risks that are intermediate between those of women living in Mexico (36 per 10,000) and US born Mexican American women (7-10 per 10,000)

- The progressive shift in risk toward the lower risk among US non-Hispanic whites suggests a shift toward more folate-rich diets

- However, Mexican American women of childbearing age consume more dietary folate than other North American women, though they use multivitamins less often