Heart is not beating

Hi, I am 43 and I am 7w1d pregnant after our 2nd IVF with ISCI cycle (1st one was m/c at 8w 4d). We had my husband’s sperm frozen and to as far as I know I do not have any problems (neither physical, nor somatic).

Today I went for my first ultrasound and the doctor didn't see a heartbeat. We are booked in for another ultrasound next week. He said that sometimes they don't see a heartbeat until 8w, but he didn't sound very hopeful although he told us there was 'still hope' – not very reassuring.

I felt moved to post and see whether any of you had any similar experiences to share and what the outcomes of those were.

I've read a few positive stories online, but all of them are years old, so I don't know whether it's still common not to see a heartbeat until later on in the pregnancy – i.e. whether the technology is now better now than it was a few years ago.