It is a hard call - you could also make a valid argument, that if you can't have children, that is what God / life had in store with you. Just because you want something to happen, does in no way mean that:
a) it should happen
b) you have a moral right to pursue ways to make it happen
By looking for alternate ways (IVF is also not without risk for the child), you open up all kinds of problems, for both the child as for the biological father. Let the donor-father / mother decide whether or not he or she wants to be contacted by their child. Only if the desire is mutual, there is any chance of a meeting / genetic information being beneficial.
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"Live your questions now, and perhaps even without knowing it, you will live along some distant day into your answers." -- Rainer Maria Rilke
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