I feel like my CFS is very much related to my cycle or blurs in with PMS and I find it very confusing! I would like to know whether that is the case for all women or whether this is only true for some people. I often can't really say whether I have a relapse as it might also be PMS. Would be great to open a broader discussion on this with all females here that experience this or thought about it. eg: the pill: I have experienced severe tiredness in PMS time during the pill and I have also experienced severe tiredness for weaks whenever I went off and then again onto the pill and wondered whether this was true for any other CFS people here - as supposedly this is not a side effect of the pill (I took one of the minipills, AIDA) - I am now off the pill since 2 years and very happy and will not interfere with my body with any hormones again! how do your PMS/CFS interfere and how do you know what is what or how do they interrelate?