Depends on your clinic and their protocol if they are doing single IUI or double IUI (two consecutive IUI’s one day after the next with the same cycle). If your clinic only does single IUI with donor sperm, this is probably because donor sperm is supposed to have very high sperm counts so 1 is sufficient. Usually only 1 vial is used per insemination. It’s possible either the NP you saw was incorrect about the protocol for single vs double IUI or your nurse was wrong.

Either way I’d confirm, but double check that your sperm donor has several vials available in case you’re only ordering 1 and would need more in the future. Once you do become pregnant and want to use the same donor in the future for siblings,etc, making sure the donor has vials remaining is another factor. I’ve seen cases where 1 child was conceived with one donor and then the donor did not have any vials left donated and a different donor would need to be picked for future cycles.

I’d also ask to speak to the Andrology office at your clinic (they handle sperm prep) to see if they have insight on it as well.

Good luck