It also states that it is 93% effective when used typically. Clinical studies have shown that Natural Cycles is 93% effective.* * Even with using the app perfe

It also states that it is 93% effective when used typically. Clinical studies have shown that Natural Cycles is 93% effective.* * Even with using the app perfectly, you can still have an unintended pregnancy. Natural Cycles is 93% effective under typical use, which means that 7 women out of 100 get pregnant during one year of use. With using the app perfectly, i.e. if you never have unprotected intercourse on red days, Natural Cycles is 99% effective, which means 1 woman out of 100 get pregnant during one year of use