Surrogacy is already a thing; stored embryos have a use without womb transplants.

Yeah, that's why I said "unless she was already considering surrogacy".

There doesn't seem to be a lot of overlap between women who ate so desperate to carry their own child that they'd undergo a womb transplant, and women who are already so committed to having a biological child that they've prepared embryos to do so by surrogacy.

But none of that answers my actual question anyway, about why it isn't possible to conceive naturally in a transplanted womb.