hello mummies,
for those interested to get doppler (me included, gynae visit must wait so long), below is an article of its safety.
According to the FDA (Food and Drug Administration), ultrasounds have been cleared for continuous use, meaning they deem them to be safe to have done routinely. Similarly home Doppler's should be used in the same manner....routinely. Using a Doppler for more than a 10 minute session and more frequently than once a day, is probably not a good idea. In fact, I personally wouldn't use mine more than once or twice a week just to be safe.
Why do you ask? Because the way a Doppler works is by sending small sound pulses into your body, then pause to listen for returning sounds. The sound waves may be irritating to the fetus. But besides simply annoying the poor kid, there is no scientific proof showing it does or doesn't cause hearing problems. For this reason alone, it is probably not a good idea to over use your Doppler. They are safe to use, according to the FDA, but as with everything you do during your pregnancy, moderation is probably best.