Is it okay to use essential oils while pregnant/nursing?

Q: Is it okay to use essential oils while pregnant/nursing?

A: According to the Essential Oils Desk Reference, the essential oils to avoid during pregnancy are: Basil, Calamus, Clary Sage, Fennel, Hyssop, Nutmeg, Rosemary, Sage, Tansy and Tarragon. Fennel and Clary Sage can help to accelerate labor once it has begun. DO NOT use these last 2 unless you're full term and labor has already started.

According to the Quick Reference Guide for Using Essential Oils, the oils to avoid are: basil, birch, calamus, cassia, cinnamon bark, hyssop, idaho tansy, lavandin, rosemary, sage, tarragon, Di-Gize, Dragon Time, Exodus II, Grounding, Mister, Estro, FemiGen, ParaFree, Protec

Oils to use cautiously are angelica, cedarwood, chamomile, cistus, citronella, clary sage, clove bud, cumin, cypress, davana, fennel, laurel, marjoram, mountain savory, myrrh, nutmeg, peppermint, rose, spearmint, vetiver, yarrow, aroma siex, clarity, harmony, immupower, relieve it, thieves, prenolone, prenolone+, comfortone, essentialzyme, dragon time massage oil "Oils that are diluted, applied externally, and used in moderation should not create a problem"