Hi Lindarn ~
I do Body Flex, too and love it. I tried Oxycise (for a change in routine), but went back to Body Flex because the results for me have been better. I went to the Oxycise Web site, and here's what it says about pregnancy:
Anyone Can Do It
One of my favorite things about Oxycise! is that truly anyone can do it. I mentioned that I was able to Oxycise! throughout my pregnancy. (Of course, you should always consult your doctor.) I've received letters, emails, phone calls from around the world -- people from all walks of life who have enjoyed success with Oxycise!
The web site that I checked is: http://www.oxycise.com/whatis.htm
But as it says ...check with your Dr first.
Hope this helps.