I had IVF, we had several spare "good quality" embryos left over and frozen.
We had to pay to keep them frozen. After we had 2 DCs of our own we decided not to pay anymore.
Our choices were; donate to another couple or donate for scientific research.
We debated this for months, I desperately wanted to help another couple but was terrified about how we would all feel if an 18 year old child came looking years later and had suffered a horrible childhood. I also hated that my kids might have siblings they didn't know.
After agonising we chose to donate to another needy couple. But strangely DH and I then had to undergo extra tests to allow them to be donated. It turned out that DH is a cystic fibrosis carrier (I think that's the correct condition). And so our lovely embryos were not allowed to be donated!!! So scientific research it was.
I found that very strange! Our 2 DC are completely healthy and no one checked before we were allowed to conceive!
Throughout all of this I genuinely never considered the pro-life view of IVF. To me the embryos were a bunch of useful cells with the potential to bring joy, but not with any rights of their own yet!
I'm now a little bit against IVF, only because I think that there are too many unwanted babies in this world. Of course I love my DCs completely and utterly but I think we should have considered adoption. (Easy for me to say now that I have my 2 DCs, I know).