....and for at least 3 months after conception.

it is recommended you eat varied foods that contain folate and those with fortified folate (some breads and other bakery items are likely to be fortified - you can check the packaging info) in them and also a supplement (tablet etc) of at least 400 micrograms a day.

good sources of natural folate include leafy vegetables, whole grains, peas, nuts, avocados and things with yeast extracts like marmite, promite, vegemite etc.

ETA: Dan i have been on supplements etc for over 2 years while TTC and when i got my levels tested recently they were only just over the minimum recommendation. gave me a bit of a scare and i am much more conscientious about it now. Happy conceiving Dan