I don't want to start a whole thread about this, but I read an article (on the Internet, so it must be true) stating that it is not medically necessary for women to have periods anymore; they can be stopped with the administration of proper hormones. Said it was a myth that periods were necessary for a woman's health. I seem to recall it said that it is reversible as well, for when you may want to get pregnant. I wonder if more women knew about this (and it is true) that they would "turn off" their periods.