I cam across this interesting thread on a forum for hopeful mothers. The consensus is that these women don't trust the scanners one bit, and good for them!
Here's the deal, ladies. There is basically zero science on what the effects of the naked scanners (be it ionizing or non-ionizing radiation) are on a developing fetus. Hopefully there is no danger and our government didn't just poison the next generation. But why risk it?
Also, remember that you are going to be more sensitive during your pregnancy - both physically and emotionally. Carefully consider how you might react when a stranger violently gropes you, asks you to expose your belly, or questions what those pads are in your bra or what that elastic band is around your waist before you buy your plane tickets.