I'm still here!!! Not been on for a few days but just had a good read through to catch up with everyone's progress.
1983 - deffo a yolk sac is a great sign! I too had a BO first time, and there was nothing, literally just a empty black gestational sac.
You asked about the yolk sac being part of the baby - it's not part of the baby, it is what "feeds" the baby in the early weeks until the placenta takes over fully at 12 weeks. On our 7 week scan we could see a very clear "ring" which was the yolk sac, and the actual baby was much smaller in size than the yolk sac, and as I said previously it was kind of "all heart beat", the whole thing seemed to be pulsing, and it was just a white fuzzy blob.
Manny - how many weeks are u now? I hope u r feeling well. Great to have friends due to close to u, my best friend is due 2 days after me! Well be lovely to go through it all together, and we'll both be off on mat leave at same time etc.
Xxx