I've had 3 miscarriages in the past so this pregnancy I'm being watched very closely.
6w2d fhr was 105bpm
7w0d fhr was 140 bpm
8w4d fhr was 167 bpm
9w0d fhr was 159 bpm
I had an ultrasound today and the baby measured 9w1d :) is the heart rate low or normal and should I be concerned it went from 167 to 159?