I had my sixteen week appointment today. There was a bit of anxiety as my OB couldn't find the baby's heartbeat with the doppler. After several minutes, we ended up moving to the other room and using the ultrasound machine.
Fortunately all looked fine, the baby was very active, etc. I never did get a clear indication of why we wouldn't have been able to hear the heartbeat with the doppler though, at almost 17 weeks. By comparison, he found it almost immediately at my last appointment, when I was just 12-13 weeks along.
Has anyone else experienced this recently? Any thoughts on why this might happen?