Hello Ma'am, congratulations on your pregnancy!
The safety of essential oils in pregnant women have been the subject of few scientific studies, which is why the application of essential oils to the skin or by ingestion is not recommended. However, there is no expectation of risk when using an aromatherapy diffuser.
To put all the odds on our side, you might want to prioritize certain essential oils that are considered "compatible" with pregnancy, such as chamomile, grapefruit, tangerine, jasmine, geranium, rose, ylang-ylang and lavender essential oils.
I hope I have answered your question
Maeva Di-Ré, Pharmacy Student
Supervised by Alexandre Chagnon, Pharmacist