Question: what essential oils are not safe to use during pregnancy?
Answer: As for essential oils that you should avoid, the IFPA lists oregano, thyme, cinnamon, clove, cumin, aniseed, fennel, sweet birch, wintergreen, and sage. NAHA also includes basil, birch, camphor, hyssop, mugwort, pennyroyal, parsley, tansy, tarragon, thuja, and wormwood.