Are the Body Scans at the airport safe if I'm pregnant?

Not all radiation is the same. There are two types of full-body scanners in service. They either use backscattered X-rays or radio waves. Though the dose is low, you should definately not go through an X-ray scanner, particularly in the first timester. In fact, the TSA is instructed not to use this type of scanner on pregnant women or children. Full-body scanners based on radio waves should be safe. So my answer for you would be, if you are selected to extra screening, is to inform the TSA agent of your condition and take the pat down option. That is what I plan to do. I don't particularly trust the agent to know which kind of light wave their scanner is using.