I decided against it and luckily because the first doppler reading where they heard anything on this one was at 24 weeks. I have an anterior placenta and no one was able to get a reading. They often wheeled the ultrasound in to make sure bubs was still alive and her heart was okay but she would hide or kick & move everytime the doppler came on obviously avoiding it. Even now when I have midwives appt and they put the doppler on, they may get 10 seconds or so of a HR but bubs really hates it because she kicks it & tries to get away from it.