I am not the best person to answer that. My PCOS likes to make things difficult for me. I know for me though the creamy/EW CM (white'ish, mildly stretchy) is what I typically get just before I do actually gear up to O... it is kinda my pre-fertile CM. A few days before I O (on a normal non-medicated cycle) my CM goes to straight EW, clear as actual egg whites and super stretchy.