I could just be a crazy father to be that worries to much but me and my wife had 2 miscarriages within this past yr we went to reproductive specialists after 2nd one now were back at reg ob for the rest of the way . We heard heartbeat 165-170 on outside doppler cause office ultrasound machine didn't have built in one. Everything measured as it should but no yolk sack week prior there was one and what we thought was a cord before I got a chance to ask her about it she was called for an er delivery. My question here is this common or maybe she didn't see it cause see don't usually do it. Any input would be great. Next scheduled ultrasound is dec 22 with the ultrasound department