So, with all this ultrasound and doppler talk, I started researching and thinking. Originally I didn't want any of either because they are thought to be linked to developmental disabilities. I let that go out of the window when I found out I was preggo bc I want to make sure everything is ok. Now I'm starting to rethink. The heat is thought to be bad. Then there is cavitation where gas pockets cave in. And on top of that it's supposedly really loud. Studies on animals have shown a change/damages in cells. Not sure what I'll do now...maybe I'll ask them to make it really quick so we can see that it has a hb and then not do another one until around 20 wks. Decisions, decisions...