Is at home fetal doppler's safe to use everyday? is exposure bad for the baby?

Yes: Dopplers do not produce a radiation exposure like X-rays. Dopplers are more like microphones - they detect sounds. Everyday use should be safe but you should consider only using it as directed by a physician. Frequent use may cause more worry than benefit.

FDA approved: Fetal dopplers are safe to use at home, without the help of a certified professional. The FDA has approved them for daily home use. Don't ever stop researching.