Hi Leuy,

I have no idea if it's all ok to use or not but a friend recently pointed out that a citronella based mosquito repellent I had been using all summer also contained pennyroyal. She said it can cause the uterus to contract!
Since that warning I've kept an eye on the products I use. I am not sure about burning essential oils, I would suppose that might be ok, but who knows?
Other oils I have since heard are to be avoided are cinnamon, wintergreen, aniseed and or fennel.
I will watch this thread and hope someone who actually knows fills us both in.

thanks, sassba