But the only person you have information about is you. You cannot extrapolate that onto an entire population, which you're clearly doing here. Now, I don't track my cycle, in part because I spend an awful lot of time on Depo-Provera and therefore without one, but do you have a reason to believe that your own presumed experiences can be applied to every woman in the world ever? Or are you just picking data that you believe fits your already-determined premise?

I'm still not sure why you think a 28-day cycle will stay aligned with one that's slightly over 29 days.

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Gillian

"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"

"You can't erase icing."

"I can't believe it doesn't work! I found it on the internet, man!"