Are foods cooked in healthier oils, like olive oil, less likely to cause nausea?

Rule 1: Eat healthy . There is little evidence for what nutrients trigger nausea in certain women in early pregnancy. So unfortunately some must select compatible foods by trial and error. Because there have been many studies showing the benefits of olive oil over other oils, it would be advisable for women to try those first, in proper amounts. Then they should see their physician and nutritionist if nausea persists.