IUI (unmedicated, no trigger): back to back vs single?

Elfi

Hello!

I am planning my first IUI this cycle (starts on Wednesday). I should be ovulating on June 2. I am doing an all natural, no trigger IUI using frozen donor sperm. i am doing it on morning ovulation day (I get peak and positive LH the day before, and temp rise day after. EWCM morning of ans dry evening of).

I was wondering if I should just do one or also one the day before (day of positive opk)?