Essential Oils and Pregnancy: What You Need to Know
Essential oils are a popular part of many people's relaxation and sleep routines. Diffusing calming scents like lavender or chamomile before bed can create a beautiful atmosphere that supports winding down. But if you are pregnant, it is important to know that not all essential oils are considered safe during pregnancy, and some should be avoided altogether.
This guide is designed to help you understand which essential oils to be cautious about during pregnancy and which ones are generally considered safe, so you can continue to enjoy aromatherapy while looking after yourself and your baby.
Why Some Essential Oils Are a Concern During Pregnancy
Essential oils are highly concentrated plant extracts, much more potent than the herbs or flowers they come from. When diffused, applied to the skin, or inhaled, the active compounds are absorbed into your body. During pregnancy, certain compounds in some essential oils have properties that could potentially affect the pregnancy in several ways.
Some oils contain compounds that may stimulate uterine contractions, which is why they are particularly cautioned against in the first trimester when the risk of miscarriage is highest. Others may affect hormonal balance, blood pressure, or blood clotting. While the risk from brief, diluted exposure is generally low, it is best to err on the side of caution.
Essential Oils to Avoid During Pregnancy
The following essential oils are commonly advised to be avoided during pregnancy, particularly during the first trimester. Always check with your healthcare provider, as individual circumstances may vary.
Oils That May Stimulate Contractions
Clary sage is one of the most commonly cautioned oils during pregnancy due to its potential to stimulate uterine contractions. It is sometimes used by midwives to support labour, which is exactly why it should be avoided earlier in pregnancy. Rosemary also has properties that may stimulate uterine activity and raise blood pressure, making it one to avoid. Jasmine is traditionally used to support labour and delivery, so it should be avoided until full term.
Oils That May Affect Hormones
Fennel contains compounds that mimic oestrogen, which could potentially disrupt hormonal balance during pregnancy. Aniseed has similar oestrogenic properties and is best avoided. Sage (common sage, distinct from clary sage) also has hormone-influencing properties and should be used with caution.
Other Oils to Avoid
Camphor can be toxic if absorbed in significant quantities and is generally avoided during pregnancy. Wintergreen contains methyl salicylate, which is related to aspirin and can affect blood clotting. Pennyroyal is one of the most dangerous oils during pregnancy and should never be used, as it has been historically associated with serious adverse outcomes. Mugwort, wormwood, and tansy are also considered unsafe due to their thujone content.
Essential Oils Generally Considered Safe After the First Trimester
Many essential oils are considered safe for use during the second and third trimesters when used properly (well-diluted, in a ventilated space, and for limited periods). However, it is always best to check with your midwife or obstetrician.
Lavender
Lavender is one of the most widely used and well-studied essential oils, and it is generally considered safe after the first trimester. Its calming properties can be particularly helpful for managing pregnancy-related anxiety and supporting better sleep.
Chamomile (Roman)
Roman chamomile is gentle and calming, and is generally considered safe in the second and third trimesters when diffused or used in very diluted form. It can help with relaxation and mild nausea.
Ylang Ylang
This floral oil is associated with relaxation and stress reduction. It is generally considered safe after the first trimester when used in moderation.
Citrus Oils
Lemon, sweet orange, and grapefruit essential oils are generally considered safe throughout pregnancy and can be uplifting and refreshing. Citrus oils can also help with pregnancy-related nausea.
How to Use Essential Oils Safely During Pregnancy
Use a Diffuser Rather Than Topical Application
Diffusing essential oils is generally considered safer during pregnancy than applying them directly to the skin, as the exposure is lower. Use your diffuser in a well-ventilated room and limit sessions to 30 to 60 minutes at a time.
Keep Concentrations Low
Use fewer drops than you normally would. During pregnancy, your sense of smell is often heightened, so you may find that a smaller amount is just as effective.
Avoid the First Trimester
Many practitioners recommend avoiding all essential oils during the first trimester as a precaution, particularly if you have a history of miscarriage or pregnancy complications.
Always Check with Your Healthcare Provider
Every pregnancy is different. What is safe for one person may not be appropriate for another, depending on your medical history, any complications, and the specific oils in question. Your midwife or obstetrician is the best source of personalised advice.
"I love using essential oils for sleep, so when I fell pregnant I was worried I would have to give them up completely. My midwife helped me understand which ones were safe after the first trimester. I now diffuse a little lavender before bed and it is such a lovely part of my wind-down routine. It helps me relax before sleep, which is so important during pregnancy."
- Emily W., Newcastle
Alternative Ways to Support Sleep During Pregnancy
If you prefer to avoid essential oils entirely during pregnancy, there are plenty of other ways to create a calming sleep environment. A consistent bedtime routine, comfortable positioning with pillows between your knees, and calming sounds through sleep headphones can all support better rest without any aromatherapy concerns.
A comfortable eye mask for blocking light and gentle breathing exercises are also safe and effective throughout pregnancy. The most important thing is finding what helps you feel calm, comfortable, and supported as you prepare for rest.
"Sleep was so difficult during my third trimester. I stopped using my diffuser to be safe and switched to sleep headphones with rain sounds instead. Combined with a pillow between my knees and an eye mask, I managed to get much better sleep than I expected. Sometimes the simplest things make the biggest difference."
- Rachel S., Perth
