So today I went in for my appt. I'm almost 32 weeks... She listened to the heart and it was only in the 120's She asked me if it was that low last appt. I didn't remeber because they had a medical student that actually took it last time and I don't think he told me.. So she checked and last appt. It was in the 150's so she hooked me up on monitors for 20 minutes and the nurse brought her the report and she said everything was great. I didn't actually get to talk to her about the results so I was wondering if anyone had this happen to them?? What could cause it, should I still be concerned?