Health Information

Contraceptive Effectiveness Rates

Contraceptive
Theoretical
Actual
Norplant
99.9%
99.9%
Depo-Provera
99.9
99.9
Birth control Pill (combination pill)
99.5-99.9
97-98
Condom & Spermicide
99
95
I.U.D
98-99
94-95
Condom Alone
98
88-90
Diaphragm & Spermicide
95-98
81-82
Cervical Cap & Spermicide
95-98
82-87

Spermicide Alone: Foams, Creams, Jellies, Vaginal Suppositories, Film

95-97
79-82
Fertility Awareness
80-98
76-80
Nothing
10-11
10-11

Abstinence remains the only means to guarantee freedom from pregnancy and STDs.

*Effectiveness rate = number of sexually active fertile women, of 100, who do not get pregnant over a one year period using the reporting method.


Adapted from Contraception Choice
University Health Services
University of Massachusetts Amherst
1995