Just in case anyone else is interested, got the following info from aromatherapy site;
OILS TO AVOID DURING PREGNANCY
Use of essential oils should be extremely limited or avoided during the first trimester of pregnancy, but has many wonderful uses in the last two trimesters and especially during labor.
Oils to avoid during pregnancy include:
Basil, Cedar Wood, Cinnamon, Clary sage (during labor), Clove, Cypress (after 5 months), Fennel, Hyssop, Jasmine (during labor), Juniper, Lemongrass, Myrrh, Parsley and Pennyroyal
OILS RECOMMENDED DURING PREGNANCY
The following oils will be comfortable for using during pregnancy. As always, use caution if you have allergies or a family history of allergies. If you feel you may be allergic to oil, do a patch test first. Good oils for pregnancy include:
Bergamot, Chamomile, Cypress (after 5 mos.), Eucalyptus, Frankincense, Geranium (avoid in early pregnancy), Grapefruit, Lavender. Lemon, Mandarin, Neroli, Patchouli, Petitgrain, Rosewood, Sandalwood and Tangerine
A bit contradictory where Cypress is concerned but might be useful all the same.