The chances of becoming pregnant on the combined oral or progestin-only contraceptive pill are as high as 9 percent, depending on the user's actions, according to United States Centers for Disease Control and Prevention. How effective the pill is depends on the user using it correctly.Continue Reading
When someone uses the contraceptive pill correctly, the failure rate falls to 0.3 percent. Scientists measuring the pill's accuracy base it on the number of women per 100 who experience a pregnancy while using it for a year. In order to make the contraceptive pill more effective, the person taking it should follow the instructions on the patient information leaflet exactly.
Women who are looking for a contraceptive with a lower failure rate may wish to try: