I have seen that many recipients require that the donor be "proven". How important is that? If the donor is not proven is there a higher chance that the results of the cycle will be less successful?
I have seen a couple of donors that may fit my requirements but they are not proven -- never donated, never been pregnant. Is that too risky to go with that donor?
Please send me your opinion or any facts that support success rates using proven donor vs. non-proven donor.
thanks!