I have a bmi of 38 and am 9 weeks. To date I've been taking pregnacare, at 5 weeks my GP wasn't bothered about me taking higher dose folio acid because of my weight. At the weekend however I met my midwife and she said I should take high dose folic acid. Should I now come off pregnacare and take the 5mg FA? And do I need a prescription for the higher dose? Thanks.