@Bongley - Thanks hun, yes had a break but ready to get going again. Oh hun you are never out of chances we wouldn't keep going if we thought that was the case. It gets harder and harder though doesn't it.
@gorgeousgeorge - Yes it seems no tests can determine that everything is good there will always be things that can not yet be tested. Swapping the baby making ingredients until they work sounds like a good strategy.
We basically had the same conversation with Warren at our last appointment. He didn't know why it wasn't working, he said it could be my eggs so we could do donor eggs, he said it could be DH sperm (due to our embryos slowing down day 4) or it basically could be the fact that together we basically make pretty 'crap' embryos. So we could also consider donor sperm or embies. We have discussed this in advance though and if it wasn't for DD we would consider it but we have to consider ourselves lucky. I still hate to hear her begging for a sibling though, when we told her she had a new cousin a while ago her reply was "I don't want a cousin I want a sister to live with us" - breaks my heart 😢.
Haha love your plan for a tribe of babies give it all you have got and see what happens!!!