Nausea typically peaks between weeks 6 and 9. Ginger and vitamin B6 have been proven equally effective at decreasing nausea. Try ginger chews, ginger tea, or fresh ginger in water. If you do not feel nauseous, include plenty of leafy greens in your diet for folate! If you are still looking for a prenatal vitamin or are struggling with your current supplement, check out the prenatal vitamin guide.