I cam to Paleo directly because of my menstrual issues - I have endometreosis.
I was (finally) diagnosed in 2004 and went to see a nutritionalist in the hopes of dealing with it without recourse to hormone therapies which my (gentleman) specialist introduced with the comforting "well, we're not sure what will work ... it won't cure it ... we'll just keep trying you on different cocktails until we find something that makes you feel a bit better" Um? No, thanks!
(The nutritionalist didn't get me to Paleo but started me on a course of eating and investigating that eventually ended here.)
Paleo has radically changed my periods for the better, these are the things that I have noticed:
(1) I rarely have pain now - if I do it is a vague cramping on day one. I don't really experience the pain that I identify with the endo side of things any more at all.
(2) My cycle has shortened, I was always a 28 day cycle but now am 26 days - you can set your watch by me!
(3) I used to have pretty much a full on 5 day period but I would say that I only have 3 days now and the rest is very light and on and off for the last two days.
(4) I used to get PMS symptons, funny tummy, confusion, clumsiness and sometimes a terrible aching sadness for no reason. That's pretty much all stopped and the emphasis on hormonal changes seems to have shifted to mid cycle ovulation where I am generally ravenous for 3 days or so and occassionally hit with the sadness - but in a much milder form.
All in all I have transitioned from violent pain and mind-fug to pretty much what I expect is considered quite normal. I really can't articulate the relief and delight I feel in having won free of the endo. On the flip side though - the minute I stray from Paleo eating I get hit like a truck and it can take a good few months for the endo symptoms to subside again. But unless I'm in a situation where I have no control or no choice (kinda rare) I've never wanted or needed to stray from Paleo .. so it's all good.