Please consult your physician for guidance. Generally, aromatherapy can be a great comfort during pregnancy. However, be sure to use essential oils and aromatherapy safely. It is advised that essential oils should not be used during the first trimester. There are certain oils that should not be used at all during pregnancy, some examples include cinnamon, clove, rosemary, and clary sage. For a full list, please consult your physician. Never ingest essential oils. In the later stages of pregnancy, certain essential oils can be used such lavender, chamomile, and ylang ylang to help you relax, and can aid sleep.Using essential oils in a diffuser is a great way to enjoy aromatherapy. If you are going to use an essential oil topically, you will need to use a carrier oil such as jojoba oil, grapeseed, sweet almond oil. Please consult your physician for final guidance on the use of essential oils.