I started receiving regular TT treatments as soon as I found out that I was pregnant. During my treatment, I would drop into that sacred space which allowed me to shift my awareness to the inner energy growing within me. Words cannot express the joy and excitement which overwhelmed me each time I had the opportunity to really get to know my unborn child in this awesome manner. I just had to make a few changes in my posture and body position to ensure that both my client and myself were comfortable. Under normal conditions of pregnancy, you would use TT to elicit a relaxation response, reduce discomfort, and promote a sense of wellbeing.
Energy flow is natural, and occurs effortlessly.
The intent in doing the treatment should be to help reestablish the natural rhythm to the client's energy field, and to facilitate the energy flow. If concerns surface, stop the treatment, and recenter. If the questions remain, then you may want to refer your client to another practitioner. Personally, I treat my pregnant clients for shorter periods and with less intensity. To date, I have not found any guidelines other than the information in D. Krieger's books, but I find the best guideline is that of trusting my own intuition.