Association between body mass index and folate insufficiency indicative of neural tube defects risk among nonpregnant women of childbearing age in the United States, NHANES, 2007-2010.

The prevalence of RBC folate concentrations indicating elevated or high NTD risk varied by level of obesity among nonpregnant women of child-bearing age. Further studies are needed to understand the folate pathway in overweight and obese women and subsequent NTD risk in their offspring.