Table 3.

Average failure rate of various contraceptive techniques (Sherwood, 2012, p. 780).

Contraceptive MethodAverage Failure Rate (Annual Pregnancies/ 100 Women)
1None90
2Natural (rhythm) methods20–30
3Coitus interruptus23
4Chemical contraceptives20
5Barrier methods10–20
6Intrauterine device4
7Oral contraceptives2–2.5
8Implanted contraceptives1