I've been on gonal f for 1 week and I went for my scan today. I have 1 15mm follicle and 1 13mm follicle. They said that my IUI will either be tomorrow or Monday. It seems really soon. Has anyone else had it happen this fast? I'm really hoping to be able to put it off till Monday in the hope that I might have 2 viable follicles by then to double my chances but they are concerned about me ovulating on Sunday.