I took it daily while TTC, up until about 6wks, then had the kitchen plastered, lost the tub and therefore missed taking the last couple of weeks. I feel really guilty now and keep thinking about Spina bifida. I have started taking it again today. I know you are supposed to take it the first 12wks, but does anyone know which weeks the spine develops? What are the risks? What foods is folic acid found in naturally?