The pill’s effectiveness depends on how consistently someone takes it. When used perfectly, the pill is more than 99% effective. But most of us aren’t perfect, so the pill’s effectiveness tends to be closer to 91%.
In other words:
Of those women who use the pill exactly as directed, fewer than 1 in 100 will experience an accidental pregnancy during the first year of using this method.
Of those women who do not use the pill exactly as directed, about 9 in 100 will experience an accidental pregnancy during the first year of using this method.
The pill’s effectiveness depends on how consistently someone takes it. When used perfectly, the pill is more than 99% effective. But most of us aren’t perfect, so the pill’s effectiveness tends to be closer to 91%.
In other words:
Of those women who use the pill exactly as directed, fewer than 1 in 100 will experience an accidental pregnancy during the first year of using this method.
Of those women who do not use the pill exactly as directed, about 9 in 100 will experience an accidental pregnancy during the first year of using this method.