PP on the baby aspirin protocol.
As far as fresh vs. frozen- this has no medical basis, but how makes sense in my head- think of it like fish. You go to a fancy seafood place on the coast that serves local fish caught within the last day - it tastes like fish. If you pick up a thing of frozen fish that sat on boat, went through a factory, and has been on the grocery store shelf for a week - it still tastes like fish, but it's not quite the same. The processing, the freezer burn, whatever.
Now there are a million perfectly good reasons to go with the frozen fish- like because you live in a land-locked state, it's cheaper, more reliable, and easier to get. And there are just as many good reasons to do a FET- it's cheaper, fewer drugs, flexible timing... So while fresh might taste better, sometimes frozen just makes sense.
At least that's how I think about it.