I agree with Tabitha; I am a midwife and I strongly advise women to be very cautious when using essential oils, as inappropriate use may cause skin irritation, photosensitivity, changes in blood pressure, temperature or fluid balance. Clary Sage in particular should be avoided during pregnancy as it is a uterine tonic and can induce labour. (Once labour is established we sometimes use it to enhance uterine contractions and it has the added benefit of an analgesic effect).
I made only one batch of soap during my last pregnancy last year. Though I was wearing a face mask, my sense of smell was super-sensitive and the smells and fumes, which I had never really noticed prior to pregnancy, made me feel really ill. Aside from the issues an enhanced sense of smell may create, I don't see why soapmaking should be discontinued during pregnancy - maybe just avoid using EO's and switch to FO's till bub is born.
Extra little note: While it is important to be cautious about EO's during pregnancy, they can also provide many wonderful benefits when used correctly; always consult a professionally trained aromatherapist if you would like to use EO's to ease pregnancy discomforts.
Another extra little note: EO's should NEVER be used on newborns. The antibacterial action of EO's may adversely effect the baby's extrauterine immunological development and some chemical constituents may cause skin irritation. The aromas may also interfere with the mother-infant bonding process, which relies greatly on odour recognition.