Just make sure you mention that you are pregnant when booking an appt to ensure that they are okay to use. The first visit usually costs more then subsequent visits as they need to spend longer with you to get history. Try not to let them pressure you into visiting more often then you feel is necessary. I've known some chiros that tell you that you need to come back often when it should be every few weeks or so. Unless, you feel that you would benefit from having more regular appts. My chiro has said that once a month is enough for me at the moment. I may increase them as I get bigger though, just for comforts sake.