[GSlob]

Who knows? Judging from what is already known, the side effects, if any, are likely to affect a minority of users - otherwise there would have already been an outcry. Or the side effects could be marginal, like gradual [vs. sudden] loss of fertility.

[rintense]

I took Seasonale, the drug that makes women have a period 4 times a year, for medical reasons (to suppress endomentriosis growth). For those who suffer from endo, suppressing estrogen is key to controlling the disease. Mine had nothing to do with birth control.