Folic acid: Is self reported use of supplements accurate?

摘要

Low folate levels before conception and in early pregnancy are associated with an increased risk of neural tube defects (NTDs).~1 Preconception folic acid supplements provide protection against NTDs. Self administered question- naires are a simple and non-invasive method of obtaining estimates of preconception folic acid use, however, their accuracy is often depend- ent on the subject matter.