Aromatherapy can be done in many ways. You can get a massage with the essential oils, use a diffuser to breathe in the aroma, or take a warm bath with a few drops of an essential oil added to the water. Try to always use oils at a concentration that’s half the standard usage, which willl reduce the amount of the oil absorbed by the skin. The most safe for pregnant women are lavender, jasmine, rose, tangerine, chamomile, neroli, ylang-ylang and lemon.