Everyone else's ultrasounds I see on here have this big solid black space with the baby/yolk sac inside but mine doesn't. Baby had a strong heartbeat of 144 bpm and I was 7w3d when it was done but baby was measuring 6w5d. I had to have a full bladder when I had it done and the US tech said it was TOO full so I had to let some out. Then she was able to see the baby and the heartbeat. I'm just curious what your opinions are as to why my black space (gestational sac?) seems so small. Is it just that my bladder was really full or something else?