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cheers nat,
i asked the doctor few weeks ago when i took smear test, she only told me to take some folic acid and she couldnt find any information in her office, then she just told me to check NHS' website to get information.
i was ordering ovulation test paper online and saw they sell folic acid as well, then just ordered together, didnt think that much:(((
ern, thanks for your advice, just im foreigner and dont have family here at all, so im not even familar with lots basic information over here yet, it took me ages to go surgery and register gp even. ...