Most studies on ginger and pregnancy nausea find that ginger does help to reduce nausea when compared to a placebo. Peppermint tea may also help to settle an upset stomach and is also safe to drink during pregnancy. While ginger can be taken in tablets or capsules, it is not recommended to take other herbal supplements in capsule form during pregnancy as they may have potential negative side effects.  Always ask your doctor or pharmacist before taking any new medications or supplements during pregnancy to ensure safety and efficiency.