Mine was 120 at my 16 week appointment too. i was also thinking it was low, but my MW didnt mention it so i guess we just have relaxed babies! x
Could it have been that baby was sleeping when you had your reading? Surely a sleeping baby would have a lower heart rate (even though it is still well within the boundaries of normal!)
Yeah she moves about all the time and at my 20 week scan everything was spot on so i wouldnt worry I remember the scan lady looking at the heart close up for a while but im guessing this is normal? (its my first baby) and she said everything looked fine. Dont know if she took a reading bpm at the 20week scan so i dont have anything to compare to. I have my next mw on tues so i will ask her then (if it stays at 120 or gets slower) and let you know if you are worried? x