There really should be not issue in treating someone who is pregnant. Perhaps just be mindful of not leaving the scanner on the abdomen, but above or below is fine. Treat the T/L and pelvis as usual. Often times they respond very well to treatment.
I have also had the joy of treating a pregnant mom recently (7months+) who had blacked out and fallen in the shower. Her uterus also showed up, it was a quick treatment and she felt she could breathe better right away. Repatterning is such a gentle technique that it’s always a firm invitation, it cannot be forced. So if the body doesn’t want to respond it won’t. However, keep in mind that any underlying issues will show up in between treatments. Usually just because they are ready to be “next”.