Hey there, I hate to deliver bad news, and I try not to, but, a slow foetal heartbeat is a pretty good indication of viability and 52 is very slow for a baby. However, it's not always definite, but it is a tell tale sign of pregnancy failure. I am afraid you will have to probably have a repeat scan to see what is going on and hope that it's not failing. I wish you all the luck in the world, and I really hope your pregnancy continues, all the best to you and your baby :)
It is a little bit on the lower side but I wouldn't count yourself out of the race yet. My last pregnancy I got an ultrasound at 6w1d we saw the heartbeat and it was like 85 bpm or something close to that and now she is 2 1/2 years old.
Hi jenny...at 6w 4d the heart beat should be100bpm or more...52 seems to be very low..what is your doc saying abt this...last time i had my MC at 6th week the heart rate was around this number and my doc told me to get ready to MC in few weeks...Im soo sorry..but god can do miracles...will keep u in my prayers...goodluck