@ksusha20 that is so interesting, your experience sounds so similar to mine. They found nothing wrong at the 13 week or the 20 week scans, everything looked perfect, then at a private 4d scan at 27 weeks they discovered polyhydramneous (extra fluid) which suggested there may have been a problem, but all tests, amnio, microray, extra detailed scans etc all came back clear, but at 33 weeks I went in with reduced movements and his heartbeat had stopped. The post mortem showed subtle signs of a genetic condition. For example a palm only had one crease, and his eyes were slightly wider apart than normal and slight retrognathia. We are having more tests done on his DNA to see if they can diagnose anything.
We named him Harley.
What did you call your daughter? How long ago did this happen to you?
It is interesting that you say about man age for gene issues. Our geneticist didn't mention that. They said it wasn't a chromasome issue, and that was caused by old eggs, but nothing was said about male. My husband is 46. I hope this does not cause a problem with our DE attempt too! Although saying that, didn't some racing car bloke become a father at age 89 recently? 
For our matching, they asked us to send them a list of our preferred donor characteristics, we said hair & eye colour, height, education level, and personality trait I think. They sent us 2 choices from that, and most were matched in the first choice.