As long as the heartbeat is between 120-160 you shouldn't be too concerned. When mine is lazy her heartbeat is usally around 125-130 and when she is active around 155-160 it all just depends! Its hard not to be concerned! Do you know what you are having yet?
Thanks for your answer...i was just a little concerned because a few weeks ago the hb was at 142 but that was right after i went for a long walk. Yesturday i was lying down for a good 4 hours and then they sent me for an ultrasound...doctor said that everything else looks good and for me to follow up with my OB/GYN...but you know how it is...you just panic over everything.
Sounds fine to me... the hb will fluctuate - sleeping, "playing", if u just ate or drank something (sugar)...