My IRL BFF is currenty in the 2WW after her 2nd IUI w/ clomid and trigger (if we both get KU'd this cycle, we'd be due 1 day apart!) Her RE keeps telling her that her chances are 10%. She came across this link and sent it to me. I figured I'd pass it along for anyone interested, though I can't vouch for it's accuracy.
https://www.in-gender.com/XYU/ART/Cumulative-Odds.aspx