Sometimes it's hard to tell if a client might be pregnant, but if you think a woman may be pregnant, we recommend you use your fingertips for releasing imbalances instead of using a magnet. Simply run the fingertips down the governing meridian, (just as you would use a magnet). This method works just as well as using a magnet, as long as your intentions are clear and strong. The rule of thumb for working with pregnant women I recommend is:  Be gentle and cautious. Unless their doctor Oks it, don't recommend any supplements, or use the magnets during the course of their pregnancy.