Menstrual cup to aid conception?

Ca
DH and I have been TTC for over a year, saw a specialist, diagnosed with MFI. We've done all the tests and our next step is IUI. We have tried pretty much everything but this so we are trying a menstrual cup this ovulation cycle for our first time! Has anyone else tried this "assisting" method to conceive? Our hopes are that it will act like a 'plug' to keep everything in for a couple hours. Any success stories??