Does vitamin e cause heart defects in unborn baby?

Possibly: Thanks for this question. A single retrospective study suggests high doses of e can significantly increase risk of congenital heart defects, but it was based on women recalling what they ate & took; such studies are not always reliable. To be safe avoid more than 30 iu/day. Too little vit e in pregnancy increases asthma. See http://www.Babymed.Com/medications/can-too-much-vitamin-e-hurt-my-baby.