Just wanted to share that I recently purchased an at home fetal heart rate doppler to put my mind at ease in long stretches between appointments and absolutely love the model I got! It was relatively inexpensive (under $50 with shipping) and I was able to find the heart beat very quickly (I was 17 weeks when I first received and tried the doppler) I ordered the Doppler from www.babydoppler.com and chose the Sonoline B model.