Had an NST currently 36 weeks and high risk. My last few NST have been perfect baby baby heart rate stay on baseline 136-150. I felt the baby move but a few times she moved off the motor and the heart rate motor stopped and then they had to find her again. Then they said she didn't have an acceleration or she also had no derateration either she was just kind of stable. The dr. Said that they was nothing concerning but she also did an ultrasound in the ultrasound the Dr. Said she was active and moving and even showed she was practicing breathing. My question is why would the machine not pick everything up doctor doesn't seem concerned but it's never happened to me before In this pregnancy or my first my