Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
Supplementation of the B vitamin folic acid in women before conception and during early pregnancy has been shown to reduce the occurrence of neural tube defects (NTDs) by at least 50-70%. As part of its work to promote folic acid, the March of Dimes offers a number of valuable online resources that healthcare providers can use with their patients.