Hi coolkat,

I wouldnt be too worried, as every baby is different....

I have read that the average babies heartbeat can vary a great deal, usually anywhere between 100 and 180bpm I think?

Also, babies heartrates can vary by as much as 25bpm each minute!

As it is, your little babies heart has only just started beating, and you were very lucky to be able to detect it at your 6 week u/s.