iui & follicle check??!!!

What comes after the follicle check for a <a href="https://glowing.com/glow-fertility-program">iui</a>? Just finished clomid yesterday and have a follicle check coming up on the 28th of feb. but I am getting stressed out because I don't know what Day to tell my partner that he should u know! They said he has to be 2-5 days with abstinence. & I don't want to tell him to do it and then I mess something up anyone help please