The following table compares the effectiveness of different
birth control methods. The column on the right shows the number of women out of
100 who will have an unplanned pregnancy in the first year of using a method.
These numbers represent studies of real-life usage.
improve on the real-life failure rate of birth control methods by consistently
using birth control methods as directed. But even if used perfectly each
time, a method will still fail to prevent a pregnancy in a certain number of
Effectiveness of birth control methods
Number of unplanned
pregnancies out of 100 typical users1, 2
Number of unplanned pregnancies out of 100 people that used the method exactly as directed1, 2