[auntiesocial]

Yes.
I, personally, have always had irregular cycles. They are MOSTLY regular now, but I have noticed that if I gain too much weight, they stop.
And if I lose too much weight too quickly, then I have them every 2-3 weeks for a month or two. (THAT'S fun.)

I was 2 weeks late in August. I also re-started Atkins in August. I do think that changing your eating habits has an effect on your cycle.