The drawback to that, though, is that it may affect the cycle in other ways; our cycles were never "normal"; ie while mine was only 4 days, it was horrifically heavy BUT on clockwork a normal timed cycle, whereas hers is 7+ days of sucky yet controllable bleeding and monster cramps BUT is not on a clockwork normal time schedule (. Anything that further screws with her cycle might backfire terribly.

Just my 2 cents.