Something that hasn't been mentioned but to me is worth consideration is the viability of stored embryos.

As I mentioned I have nine frozen at the moment and plan to use at least one. I am fully aware though that in that process, we may run through the entire store of embryos before we find one that survives the thaw and is healthy enough to transfer.

Even though an embryo appears viable right before freezing, quite a lot of them may not make it any further once thawed. This is not so much a result of being frozen but more like the natural attrition that would occur anyway. As in nature, not all conceptions go on to become a baby. That said even though the freeze/thaw technology is very good these days, there may be some cells which do not recover from that process.

It then becomes a matter of whether you accept this as part of the process or whether it is still outside the bounds of what you consider morally acceptable so far as the creation of life is concerned. This might be balanced by how you feel about going through repeated stim cycles in order to obtain the embryos you need before you have success.
Counselling given to couples prior to starting IVF is geared toward nutting out a lot of these issues.

BW - I am not sure about your question but it might be good to chat to the clinic about it.