Hi, I was able to find it at 10wks, but the first time I tried I couldn't find it. I looked at my ultrasound pic which helped me find the spot, I had been searching in the wrong spots. Mine is right by the pubic bone/ hair line and in the middle to the right. Try really low, the first time I heard it was the most clear, now it seems to be there but moving a lot and I hear it off and on. It can be frustrating.